Point all GitHub actions to mainline following final merge

Author: Skptak

.github/workflows/ci.yml

@@ -108,7 +108,7 @@ jobs:
       - name: Clone This Repo
         uses: actions/checkout@v3
       - name: Run spellings check
-        uses: FreeRTOS/CI-CD-GitHub-Actions/spellings@v2
+        uses: FreeRTOS/CI-CD-Github-Actions/spellings@main
         with:
           path: ./
 
@@ -146,7 +146,7 @@ jobs:
       - name: Check Links
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        uses: FreeRTOS/CI-CD-Github-Actions/link-verifier@v2
+        uses: FreeRTOS/CI-CD-Github-Actions/link-verifier@main
 
   verify-manifest:
     runs-on: ubuntu-latest
@@ -167,7 +167,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Run doxygen build
-        uses: FreeRTOS/CI-CD-Github-Actions/doxygen@v2
+        uses: FreeRTOS/CI-CD-Github-Actions/doxygen@main
         with:
           path: ./
   memory_statistics:
@@ -179,7 +179,7 @@ jobs:
         with:
           python-version: "3.7.x"
       - name: Measure sizes
-        uses: FreeRTOS/CI-CD-Github-Actions/memory_statistics@v2
+        uses: FreeRTOS/CI-CD-Github-Actions/memory_statistics@main
         with:
           config: .github/memory_statistics_config.json
           check_against: docs/doxygen/include/size_table.md

.github/workflows/formatting.yml

@@ -19,5 +19,5 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Apply Formatting Fix
-      uses: FreeRTOS/CI-CD-Github-Actions/formatting-bot@v2
+      uses: FreeRTOS/CI-CD-Github-Actions/formatting-bot@main
       id: check-formatting