[CI] bump workflow actions to use node-v20 runtime

Author: clangenb

.github/workflows/android_build.yml

@@ -21,7 +21,7 @@ jobs:
     timeout-minutes: 60
     steps:
       # Setup Environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-java@v3
         with:

.github/workflows/android_integration_test.yml

@@ -35,7 +35,7 @@ jobs:
       fail-fast: false
     steps:
       # Setup Environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-java@v3
         with:

.github/workflows/fdroid.yml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 30
     steps:
       # Setup Environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Check fdroid setup
         run: ./scripts/fdroid_init.sh

.github/workflows/ios_integration_test.yml

@@ -43,7 +43,7 @@ jobs:
       fail-fast: false
     steps:
       # Setup Environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: prepare xcode
         uses: maxim-lobanov/setup-xcode@v1

.github/workflows/unit_tests.yml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 30
     steps:
       # Setup Environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install flutter wrapper
         run: ./scripts/install_flutter_wrapper.sh