build(deps): Bump actions/download-artifact from 4.1.9 to 4.2.0 (weaveworks#4856)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/nightly.yaml

@@ -138,7 +138,7 @@ jobs:
           retention-days: 3
 
     - name: Download test artifacts
-      uses: actions/download-artifact@cc203385981b70ca67e1cc392babf9cc229d5806 # v4.1.9
+      uses: actions/download-artifact@b14cf4c92620c250e1c074ab0a5800e37df86765 # v4.2.0
       if: success() || failure()
       with:
         name: playwright-tests-report