Update actions/checkout to v3

.github/workflows/attach_debug_apks_to_release.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           ref: ${{ env.GITHUB_REF }}
 

.github/workflows/debug_build.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Build APKs
         shell: bash {0}

.github/workflows/gradle-wrapper-validation.yml

@@ -15,5 +15,5 @@ jobs:
     name: "Validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: gradle/wrapper-validation-action@v1

.github/workflows/run_tests.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Clone repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Execute tests
       run: |
         ./gradlew test