ci: Bump actions/download-artifact from 4 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build-compiler-release.yml

@@ -107,7 +107,7 @@ jobs:
       contents: write
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
         with:
           merge-multiple: true
 

.github/workflows/build-release.yml

@@ -133,7 +133,7 @@ jobs:
       contents: write
     steps:
       - name: Download all artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v7
 
       - name: List artifacts
         run: find . -type f -name "*.dmg" -o -name "*.msi" -o -name "*.exe" -o -name "*.AppImage" -o -name "*.deb"