Upgrade GitHub Actions for Node 24 compatibility (#415)

## Summary

Upgrade GitHub Actions to their latest versions to ensure compatibility
with Node 24, as Node 20 will reach end-of-life in April 2026.

## Changes

| Action | Old Version(s) | New Version | Release | Files |
|--------|---------------|-------------|---------|-------|
| `actions/checkout` |
[`v4`](https://github.com/actions/checkout/releases/tag/v4) |
[`v6`](https://github.com/actions/checkout/releases/tag/v6) |
[Release](https://github.com/actions/checkout/releases/tag/v6) |
build-run-tests.yml, build-tag-publish.yml |
| `actions/setup-java` |
[`v4`](https://github.com/actions/setup-java/releases/tag/v4) |
[`v5`](https://github.com/actions/setup-java/releases/tag/v5) |
[Release](https://github.com/actions/setup-java/releases/tag/v5) |
build-run-tests.yml |
| `actions/setup-python` |
[`v5`](https://github.com/actions/setup-python/releases/tag/v5) |
[`v6`](https://github.com/actions/setup-python/releases/tag/v6) |
[Release](https://github.com/actions/setup-python/releases/tag/v6) |
build-run-tests.yml |

## Context

Per [GitHub's
announcement](https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/),
Node 20 is being deprecated and runners will begin using Node 24 by
default starting March 4th, 2026.

### Why this matters

- **Node 20 EOL**: April 2026
- **Node 24 default**: March 4th, 2026
- **Action**: Update to latest action versions that support Node 24

### Security Note

Actions that were previously pinned to commit SHAs remain pinned to SHAs
(updated to the latest release SHA) to maintain the security benefits of
immutable references.

### Testing

These changes only affect CI/CD workflow configurations and should not
impact application functionality. The workflows should be tested by
running them on a branch before merging.

Signed-off-by: Salman Muin Kayser Chishti <[email protected]>

Author: salmanmkc

.github/workflows/build-run-tests.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout project sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           distribution: 'microsoft'
           java-version: '17'
@@ -30,7 +30,7 @@ jobs:
         run: sleep 30
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.x'
 

.github/workflows/build-tag-publish.yml

@@ -15,7 +15,7 @@ jobs:
     needs: build-and-run-tests
     steps:
       - name: Checkout project sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0