ci: update actions/upload-artifact to v4

Signed-off-by: Oliver Kurth <[email protected]>

Author: oliverkurth

.github/workflows/build-tdnf-rpms.yml

@@ -18,7 +18,7 @@ jobs:
               run: |
                 docker run --rm -e DIST -v$(pwd):/build -w/build ${DIST}/tdnf-build ./ci/build-rpms.sh
             - name: upload RPMs
-              uses: actions/upload-artifact@v2
+              uses: actions/upload-artifact@v4
               with:
                   name: tdnf-rpms
                   path: rpms