Fix NFG docker meta

Author: shaun-nx

.github/workflows/conformance.yml

@@ -83,7 +83,7 @@ jobs:
             type=edge,suffix=${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }}
             type=schedule,suffix=${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }}
             type=ref,event=pr,suffix=${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }}
-            type=ref,event=branch,suffix=-rc${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }},enable=${{ startsWith(github.ref, 'refs/heads/release') && inputs.tag == '' }} && !inputs.production-release }}
+            type=ref,event=branch,suffix=-rc${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }},enable=${{ startsWith(github.ref, 'refs/heads/release') && !inputs.production-release }}
             type=raw,value={{ inputs.release_version }},enable={{ inputs.production-release && inputs.release_version != '' }},suffix=${{ inputs.build-os != '' && format('-{0}', inputs.build-os) || '' }}
 
       - name: NGINX Docker meta