chore(deps): update dawidd6/action-download-artifact action to v21

Author: renovate[bot]

.github/workflows/GnuTests.yml

@@ -354,7 +354,7 @@ jobs:
         path: 'uutils'
         persist-credentials: false
     - name: Retrieve reference artifacts
-      uses: dawidd6/action-download-artifact@v20
+      uses: dawidd6/action-download-artifact@v21
       # ref: <https://github.com/dawidd6/action-download-artifact>
       continue-on-error: true ## don't break the build for missing reference artifacts (may be expired or just not generated yet)
       with:

.github/workflows/make.yml

@@ -201,14 +201,14 @@ jobs:
               --arg multisize "$SIZE_MULTI" \
               '{($date): { sha: $sha, size: $size, multisize: $multisize, }}' > size-result.json
     - name: Download the previous individual size result
-      uses: dawidd6/action-download-artifact@v20
+      uses: dawidd6/action-download-artifact@v21
       with:
         workflow: make.yml
         name: individual-size-result
         repo: uutils/coreutils
         path: dl
     - name: Download the previous size result
-      uses: dawidd6/action-download-artifact@v20
+      uses: dawidd6/action-download-artifact@v21
       with:
         workflow: make.yml
         name: size-result