Fix grammar errors (mdn#33449)

* as if its an -> as if it is an

* fix possessive pronoun: it's -> its

files/en-us/games/publishing_games/game_monetization/index.md

@@ -44,7 +44,7 @@ Finding publishers might be hard at first — try to look for them at the [HTML5
 
 ### Exclusive licenses
 
-The exclusive license is a type of license for one publisher — you've built a game and you're selling all the rights to it to a single entity along with the rights to redistribute it — [Softgames](https://www.softgames.com/) are an example of such a publisher. You can't sell it again in any form while that publisher has the rights — that's why exclusive deals are worth quite a lot of money. How much exactly? It depends on the quality of the game, it's genre, its publisher, and many others, but usually it will be something between 2000 and 5000 USD. Once you've sold an exclusive license you can forget about promoting that particular game as you won't earn more, so go into such a deal only if you're sure it's profitable enough.
+The exclusive license is a type of license for one publisher — you've built a game and you're selling all the rights to it to a single entity along with the rights to redistribute it — [Softgames](https://www.softgames.com/) are an example of such a publisher. You can't sell it again in any form while that publisher has the rights — that's why exclusive deals are worth quite a lot of money. How much exactly? It depends on the quality of the game, its genre, its publisher, and many others, but usually it will be something between 2000 and 5000 USD. Once you've sold an exclusive license you can forget about promoting that particular game as you won't earn more, so go into such a deal only if you're sure it's profitable enough.
 
 ### Non-exclusive licenses
 

files/en-us/web/api/audioparam/linearramptovalueattime/index.md

@@ -56,7 +56,7 @@ const linearRampMinus = document.querySelector(".linear-ramp-minus");
 // Feed the HTMLMediaElement into it
 const source = audioCtx.createMediaElementSource(myAudio);
 
-// Create a gain node and set it's gain value to 0.5
+// Create a gain node and set its gain value to 0.5
 const gainNode = audioCtx.createGain();
 
 // connect the AudioBufferSourceNode to the gainNode

files/en-us/web/api/audioparam/settargetattime/index.md

@@ -114,7 +114,7 @@ const atTimeMinus = document.querySelector(".at-time-minus");
 // Feed the HTMLMediaElement into it
 const source = audioCtx.createMediaElementSource(myAudio);
 
-// Create a gain node and set it's gain value to 0.5
+// Create a gain node and set its gain value to 0.5
 const gainNode = audioCtx.createGain();
 gainNode.gain.value = 0.5;
 let currGain = gainNode.gain.value;

files/en-us/web/api/audioparam/setvalueattime/index.md

@@ -60,7 +60,7 @@ const targetAtTimeMinus = document.querySelector(".set-target-at-time-minus");
 // Feed the HTMLMediaElement into it
 const source = audioCtx.createMediaElementSource(myAudio);
 
-// Create a gain node and set it's gain value to 0.5
+// Create a gain node and set its gain value to 0.5
 const gainNode = audioCtx.createGain();
 gainNode.gain.value = 0.5;
 let currGain = gainNode.gain.value;

files/en-us/web/api/audioparam/setvaluecurveattime/index.md

@@ -83,7 +83,7 @@ const valueCurve = document.querySelector(".value-curve");
 // Feed the HTMLMediaElement into it
 const source = audioCtx.createMediaElementSource(myAudio);
 
-// Create a gain node and set it's gain value to 0.5
+// Create a gain node and set its gain value to 0.5
 const gainNode = audioCtx.createGain();
 gainNode.gain.value = 0.5;
 const currGain = gainNode.gain.value;

files/en-us/web/javascript/guide/using_classes/index.md

@@ -470,7 +470,7 @@ In this case, pretty much every field and method is private to the class. Thus,
 
 ## Accessor fields
 
-`color.getRed()` and `color.setRed()` allow us to read and write to the red value of a color. If you come from languages like Java, you will be very familiar with this pattern. However, using methods to simply access a property is still somewhat unergonomic in JavaScript. _Accessor fields_ allow us to manipulate something as if its an "actual property".
+`color.getRed()` and `color.setRed()` allow us to read and write to the red value of a color. If you come from languages like Java, you will be very familiar with this pattern. However, using methods to simply access a property is still somewhat unergonomic in JavaScript. _Accessor fields_ allow us to manipulate something as if it is an "actual property".
 
 ```js
 class Color {