chore: upgrade actions/checkout to v4 across workflow files

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set Up Java
         uses: actions/setup-java@v3
@@ -66,7 +66,7 @@ jobs:
 
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Download APK Artifact
         uses: actions/download-artifact@v3

.github/workflows/flutter-ci.yml

@@ -7,13 +7,13 @@ on:
       - master
 
 jobs:
-  analyze:
-    name: Analyze Flutter Code
+  flutter-ci:
+    name: Analyze and Run Tests
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install jq
         run: sudo apt-get install -y jq
@@ -42,37 +42,16 @@ jobs:
         working-directory: rust_builder
         run: flutter pub get
 
-      - name: Install Dependencies for Rust Builder Project
+      - name: Install Dependencies for Rust Builder Project (subdirectory)
         working-directory: rust_builder/cargokit/build_tool
         run: flutter pub get
 
       - name: Run Flutter Analyze
         run: flutter analyze
 
-      - name: Fail on Errors
-        if: failure()
-        run: exit 1
-
-  test:
-    name: Run Flutter Tests
-    runs-on: ubuntu-latest
-    needs: analyze
-
-    steps:
-      - name: Checkout Code
-        uses: actions/checkout@v3
-
-      - name: Set Up Flutter
-        uses: subosito/flutter-action@v2
-        with:
-          flutter-version: ${{ env.flutter-version }}
-
-      - name: Install Dependencies
-        run: flutter pub get
-
       - name: Run Flutter Tests
         run: flutter test
 
-      - name: Fail on Test Errors
+      - name: Fail on Errors
         if: failure()
         run: exit 1

.github/workflows/label-pr.yml

@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Analyze PR Title
         id: analyze_title