ci: Remove workflow_dispatch

.github/workflows/publish-release-to-ghcr.yml

@@ -2,11 +2,6 @@ name: publish-release-to-ghcr
 on:
   release:
     types: [published]
-  workflow_dispatch:
-    ref:
-      description: "Branch, tag or SHA to checkout"
-      required: true
-      default: "master"
 concurrency:
   group: ${{ github.workflow }}
   cancel-in-progress: true
@@ -27,7 +22,7 @@ jobs:
       - name: Get image repository
         run: echo IMAGE_REPOSITORY=$(echo ghcr.io/${{ github.actor }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
       - name: Get the release
-        run: echo RELEASE=${{ github.event.inputs.ref }} >> $GITHUB_ENV
+        run: echo RELEASE=${GITHUB_REF/refs\/tags\//} >> $GITHUB_ENV
       - name: Login to Registry
         uses: docker/login-action@v2
         with: