Updated checkout CI action to v3 to fix deprecation warnings (#8834)

.github/workflows/buildAndDeploy.yml

@@ -28,7 +28,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: actions/setup-java@v3
         with:

.github/workflows/mkdocs.yml

@@ -8,7 +8,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: 3.x

.github/workflows/uncivbot.yml

@@ -11,7 +11,7 @@ jobs:
     # This is the only place I could find an apparent list of valid author associations. Also, at least they're not case-sensitive: https://docs.github.com/en/graphql/reference/enums#commentauthorassociation https://docs.github.com/en/actions/learn-github-actions/expressions#contains
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v2
       - name: Generate new buildConfig.kt and changelog.md files
         run: |
@@ -40,7 +40,7 @@ jobs:
     # This is the only place I could find an apparent list of valid author associations. Also, at least they're not case-sensitive: https://docs.github.com/en/graphql/reference/enums#commentauthorassociation https://docs.github.com/en/actions/learn-github-actions/expressions#contains
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v2
       - name: Add translation PRs to the new branch, and PR the new branch to master