ci: update verbiage for steps (#1721)

.github/workflows/nightly-release.yaml

@@ -4,8 +4,8 @@ on:
     - cron: '0 0 * * *'
   workflow_dispatch: {}
 jobs:
-  build-publish:
-    name: Build and publish nightly Docker image
+  build-release:
+    name: Build and release Docker image
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -17,5 +17,5 @@ jobs:
           docker build \
           -t "ghcr.io/${GITHUB_REPOSITORY}:${GITHUB_SHA:0:7}" \
           -t "ghcr.io/${GITHUB_REPOSITORY}:nightly" .
-      - name: Publish Docker image
+      - name: Release Docker image
         run: docker push "ghcr.io/${GITHUB_REPOSITORY}"