fix: Default maximize_build_space to true (#54)

action.yml

@@ -33,10 +33,9 @@ inputs:
   maximize_build_space:
     description: |
       Whether to run the unwanted software remover to maximize build space in the GitHub builder.
-      Use this if your builds are taking too much space.
-      Input must match the string 'true' for the step to be enabled.
+      Disable this with 'false' if your image doesn't take up a lot of space and you'd rather have shorter build times.
     required: false
-    default: 'false'
+    default: 'true'
   use_unstable_cli:
     description: |
       If true, this action pulls the `main` branch of blue-build/cli instead of the stable version the current action version is configured to use by default.