Update checkout action to v4

Author: keyboardsurfer

.github/workflows/copy-branch.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it,
     # but specifies master branch (old default).
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
         ref: master

.github/workflows/firebase_test_lab.yml

@@ -19,7 +19,7 @@ jobs:
       macrobenchmark: ${{ steps.filter.outputs.macrobenchmark }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 1
     - uses: dorny/paths-filter@v2
@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 1
 

.github/workflows/generate-bp.yml

@@ -23,7 +23,7 @@ jobs:
       macrobenchmark: ${{ steps.filter.outputs.macrobenchmark }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - uses: dorny/paths-filter@v2
         id: filter
         with:
@@ -42,7 +42,7 @@ jobs:
         working-directory: ./MacrobenchmarkSample
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup JDK
         id: setup-java