Lower approval requirements

This pull requests lowers the approval requirements until we have a more
sophisticated tool. So, that we could do assign a voting power per rank
and then require that X amount of voting power. This would then mean
that may 3 rank II approvals having the same voting power as rank III.

.github/review-bot.yml

@@ -4,7 +4,7 @@ rules:
       include:
         - ^\.github/.*
     type: fellows
-    minRank: 4
+    minRank: 3
     minApprovals: 2
   - name: Relay and system files
     condition:
@@ -13,8 +13,8 @@ rules:
         - ^system-parachains\/.*
         - ^CHANGELOG.md$
     type: fellows
-    minRank: 3
-    minApprovals: 4
+    minRank: 2
+    minApprovals: 3
   - name: General Files
     condition:
       include:
@@ -25,4 +25,4 @@ rules:
         - ^\.github/.*
         - ^CHANGELOG.md$
     type: fellows
-    minRank: 2
+    minRank: 1

.github/workflows/review-trigger.yml

@@ -1,6 +1,6 @@
 name: Review-Trigger
 
-on: 
+on:
   pull_request_target:
     types:
       - opened