Update HomeBrew on macOS 13

Author: radarhere

.github/workflows/macos-install.sh

@@ -4,6 +4,9 @@ set -e
 
 if [[ "$ImageOS" == "macos13" ]]; then
     brew uninstall gradle maven
+
+    # https://github.com/actions/runner-images/pull/12897#issuecomment-3307703275
+    brew update
 fi
 brew install \
     aom \