Update actions/upload-artifact digest to b4b15b8 (#756)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/integrationtests.yml

@@ -32,7 +32,7 @@ jobs:
         run: ./build.sh --target=Create-NuGet-Packages
         shell: bash
       - name: Publish NuGet package as build artifact
-        uses: actions/upload-artifact@604373da6381bf24206979c74d06a550515601b9 # v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: NuGet Package
           path: ./BuildArtifacts/Packages/NuGet/