Bump docker/metadata-action from 5.5.0 to 5.5.1 (#1519)

Bumps [docker/metadata-action](https://github.com/docker/metadata-action) from 5.5.0 to 5.5.1.
- [Release notes](https://github.com/docker/metadata-action/releases)
- [Commits](docker/metadata-action@dbef880...8e5442c)

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

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -82,7 +82,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-gateway-fabric,enable=${{ inputs.image == 'ngf' && github.event_name != 'pull_request' }}

.github/workflows/ci.yml

@@ -165,7 +165,7 @@ jobs:
 
       - name: NGF Docker meta
         id: ngf-meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-gateway-fabric
@@ -177,7 +177,7 @@ jobs:
 
       - name: NGINX Docker meta
         id: nginx-meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-gateway-fabric/nginx

.github/workflows/conformance.yml

@@ -48,7 +48,7 @@ jobs:
 
       - name: NGF Docker meta
         id: ngf-meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-gateway-fabric
@@ -60,7 +60,7 @@ jobs:
 
       - name: NGINX Docker meta
         id: nginx-meta
-        uses: docker/metadata-action@dbef88086f6cef02e264edb7dbf63250c17cef6c # v5.5.0
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
         with:
           images: |
             name=ghcr.io/nginxinc/nginx-gateway-fabric/nginx