Update lucacome/docker-image-update-checker action to v2 (#2678)

* Update lucacome/docker-image-update-checker action to v2

| datasource  | package                              | from   | to     |
| ----------- | ------------------------------------ | ------ | ------ |
| github-tags | lucacome/docker-image-update-checker | v1.2.1 | v2.0.0 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

* Update update-docker-images.yml

---------

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Luca Comellini <[email protected]>

Author: renovate[bot]

.github/workflows/update-docker-images.yml

@@ -3,6 +3,7 @@ name: Update Docker Images
 on:
   schedule:
     - cron: "0 2 * * *" # run every day at 02:00 UTC
+  workflow_dispatch:  # yamllint disable-line rule:empty-values
 
 defaults:
   run:
@@ -61,7 +62,7 @@ jobs:
 
       - name: Check if update available for nginx image
         id: update
-        uses: lucacome/docker-image-update-checker@f50d56412b948cfdbb842c5419372681e0db3df1 # v1.2.1
+        uses: lucacome/docker-image-update-checker@a233de0585661c019fb71f9601328db37051cc66 # v2.0.0
         with:
           base-image: ${{ needs.variables.outputs.nginx_version }}
           image: ghcr.io/nginxinc/nginx-gateway-fabric/nginx:${{ needs.variables.outputs.ngf_tag }}