fix: use upload-artifact@v5 instead of v2 (guacsec#311)

Author: Strum355

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
           git push origin "$BRANCH"
           echo "$BRANCH" > releasebranch.txt
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v5
         with:
           name: releasebranch
           path: releasebranch.txt