build(deps): bump docker/metadata-action from 5.4.0 to 5.5.1 (#893)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.4.0 to 5.5.1.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@9dc751f...8e5442c)

---
updated-dependencies:
- dependency-name: docker/metadata-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/docker-main.yaml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
         with:
           # list of Docker images to use as base name for tags
           images: |

.github/workflows/docker-version-branches.yaml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
         with:
           # list of Docker images to use as base name for tags
           images: |

.github/workflows/release.yaml

@@ -22,7 +22,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@9dc751fe249ad99385a2583ee0d084c400eee04e
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
         with:
           images: |
             pomerium/ingress-controller