fix(build): correctly grab docker-gen version from dockerfile (#2622)

.github/workflows/build-publish-dispatch.yml

@@ -27,7 +27,7 @@ jobs:
 
       - name: Retrieve docker-gen version
         id: docker-gen_version
-        run: sed -n -e 's;^FROM nginxproxy/docker-gen:\([0-9.]*\).*;VERSION=\1;p' Dockerfile.${{ matrix.base }} >> "$GITHUB_OUTPUT"
+        run: sed -n -e 's;^FROM docker.io/nginxproxy/docker-gen:\([0-9.]*\).*;VERSION=\1;p' Dockerfile.${{ matrix.base }} >> "$GITHUB_OUTPUT"
 
       - name: Get Docker tags
         id: docker_meta

.github/workflows/build-publish.yml

@@ -38,7 +38,7 @@ jobs:
 
       - name: Retrieve docker-gen version
         id: docker-gen_version
-        run: sed -n -e 's;^FROM nginxproxy/docker-gen:\([0-9.]*\).*;VERSION=\1;p' Dockerfile.${{ matrix.base }} >> "$GITHUB_OUTPUT"
+        run: sed -n -e 's;^FROM docker.io/nginxproxy/docker-gen:\([0-9.]*\).*;VERSION=\1;p' Dockerfile.${{ matrix.base }} >> "$GITHUB_OUTPUT"
 
       - name: Get Docker tags
         id: docker_meta