ci: improve GHA workflows + update actions/checkout to v5

Author: striezel

.github/workflows/alpine.yml

@@ -14,10 +14,12 @@ jobs:
           apk add git
           git config --global --add safe.directory "$GITHUB_WORKSPACE"
       # Checks-out the repository under $GITHUB_WORKSPACE.
-      - uses: actions/checkout@v4
+      - Name: Checkout
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
+          persist-credentials: false
       - name: Install packages
         run: |
           apk update

.github/workflows/alpine_arm.yml

@@ -26,15 +26,24 @@ jobs:
         run: |
           apk add nodejs
           sed -i 's~ID=alpine~ID=nopine~g' /etc/os-release
-          cd /host/home/runner/runners/*/externals/
+          cd /host/home/runner/actions-runner/*/externals/
           rm -rf node20/*
           mkdir node20/bin
           ln -s /usr/bin/node node20/bin/node
+          # Fake Node.js 24 for actions/checkout@v5.
+          # Currently, Alpine 3.22 has Node.js 22.16.0, but that seems to work,
+          # too, because it looks like checkout is not using any stuff specific
+          # to Node.js 24.
+          rm -rf node24/*
+          mkdir node24/bin
+          ln -s /usr/bin/node node24/bin/node
       # Checks-out the repository under $GITHUB_WORKSPACE.
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
+          persist-credentials: false
       - name: Install packages
         run: |
           apk update

.github/workflows/clang.yml

@@ -11,9 +11,11 @@ jobs:
         version: [14, 16, 18]
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE.
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v5
         with:
           submodules: 'recursive'
+          persist-credentials: false
       - name: Install Debian packages
         run: |
           sudo apt-get update

.github/workflows/gcc.yml

@@ -11,9 +11,11 @@ jobs:
         version: [9, 12, 13, 14]
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE.
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v5
         with:
           submodules: 'recursive'
+          persist-credentials: false
       - name: Install Debian packages
         run: |
           sudo apt-get update

.github/workflows/msys2.yml

@@ -10,10 +10,12 @@ jobs:
         shell: msys2 {0}
     steps:
       # Checks-out the repository under $GITHUB_WORKSPACE.
-      - uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
           submodules: 'recursive'
+          persist-credentials: false
       - uses: msys2/setup-msys2@v2
         with:
           msystem: mingw64