[no-issue]:svarga:ci, opt into Node 24 runtime and bump pinned action versions

- Add FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true at workflow level in ci.yml,
  package.yml, docs.yml to silence Node 20 deprecation warnings from transitive
  actions (awalsh128/cache-apt-pkgs-action -> actions/cache/restore@v4,
  codecov/codecov-action -> actions/github-script, direct actions/cache@v4).
- Bump package.yml: actions/checkout@v4 -> @v6, actions/upload-artifact@v4 -> @v7,
  actions/download-artifact@v4 -> @v8 (aligns with ci.yml).
- Bump docs.yml: actions/checkout@v4 -> @v6.

Author: steven-varga

.github/workflows/ci.yml

@@ -10,6 +10,12 @@ on:
 permissions:
   contents: write
 
+env:
+  # Opt into Node 24 runtime for JavaScript actions (default flips 2026-06-02).
+  # Silences deprecation warnings from transitive Node-20 actions inside
+  # awalsh128/cache-apt-pkgs-action, codecov/codecov-action, and actions/cache@v4.
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+
 concurrency:
   group: ci-${{ github.ref }}
   cancel-in-progress: true

.github/workflows/docs.yml

@@ -5,15 +5,19 @@ on:
     branches: [release, staging]
 
 permissions:
-  contents: write 
+  contents: write
+
+env:
+  # Opt into Node 24 runtime for JavaScript actions (default flips 2026-06-02).
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
 
 jobs:
   deploy:
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v5

.github/workflows/package.yml

@@ -7,6 +7,10 @@ on:
 permissions:
   contents: write
 
+env:
+  # Opt into Node 24 runtime for JavaScript actions (default flips 2026-06-02).
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
+
 jobs:
   package:
     name: ${{ matrix.os }} / ${{ matrix.format }}
@@ -51,7 +55,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -214,7 +218,7 @@ jobs:
           CPACK_RPM_PACKAGE_ARCHITECTURE: ${{ matrix.rpm_arch }}
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: h5cpp-compiler-${{ matrix.os }}-${{ matrix.format }}
           if-no-files-found: error
@@ -232,10 +236,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: artifacts
           pattern: h5cpp-compiler-*