build(deps): bump dawidd6/action-download-artifact from 5 to 6

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 5 to 6.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/bench.yml

@@ -17,7 +17,7 @@ jobs:
 
     - name: Download prebuilt pkgcraft-c library
       id: download-artifact
-      uses: dawidd6/action-download-artifact@v5
+      uses: dawidd6/action-download-artifact@v6
       with:
         github_token: ${{ secrets.PKGCRAFT_CI_TOKEN }}
         repo: pkgcraft/pkgcraft

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
 
     - name: Download pkgcraft-c library from most recent run
       if: ${{ inputs.event-type == '' }}
-      uses: dawidd6/action-download-artifact@v5
+      uses: dawidd6/action-download-artifact@v6
       with:
         github_token: ${{ secrets.PKGCRAFT_CI_TOKEN }}
         repo: pkgcraft/pkgcraft

.github/workflows/lint.yml

@@ -24,7 +24,7 @@ jobs:
 
     - name: Download prebuilt pkgcraft-c library
       id: download-artifact
-      uses: dawidd6/action-download-artifact@v5
+      uses: dawidd6/action-download-artifact@v6
       with:
         github_token: ${{ secrets.PKGCRAFT_CI_TOKEN }}
         repo: pkgcraft/pkgcraft