chore(deps): update docker/metadata-action action to v5.9.0

Author: renovate[bot]

.github/workflows/dex.yaml

@@ -39,7 +39,7 @@ jobs:
 
       - name: Generate Docker Metadata
         id: meta
-        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
+        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
         with:
           images: |
             ghcr.io/hyprmcp/dex