New icon, move user mentions to env

Author: Peter-Sh

.github/actions/common/func.sh

@@ -340,6 +340,7 @@ slack_format_docker_image_urls_message() {
         )
         as $items
         | {
+            icon_url: ":redis-circle:",
             text: ("🐳 Docker Images Published for Redis: " + $release_tag),
             blocks: [
                 {
@@ -383,6 +384,7 @@ slack_format_docker_PR_message() {
 # Create Slack message payload
     cat << EOF
 {
+"icon_url": ":redis-circle:",
 "text": "🐳 Docker Library PR created for Redis: $release_tag",
 "blocks": [
     {

.github/workflows/release_publish.yml

@@ -16,6 +16,8 @@ env:
   #TARGET_OFFICIAL_IMAGES_REPO: docker-library/official-images
   TARGET_OFFICIAL_IMAGES_REPO: Peter-Sh/official-images
   FORKED_OFFICIAL_IMAGES_REPO: redis-developer/docker-library-official-images
+  #PR_USER_MENTIONS: "@adamiBs @yossigo @adobrzhansky @maxb-io @dagansandler @Peter-Sh"
+  PR_USER_MENTIONS: ""
 
 # UUID is used to help automation to identify workflow run in the list of workflow runs.
 run-name: "Release Publish${{ github.event.inputs.workflow_uuid && format(': {0}', github.event.inputs.workflow_uuid) || '' }}"
@@ -113,9 +115,9 @@ jobs:
 
             Release commit: ${{ steps.parse-release.outputs.release_commit_sha }}
             Release tag: v${{ steps.parse-release.outputs.release_version }}
-            Compare: $GITHUB_SERVER_URL/$GITHUB_REPOSITORY/compare/v${{ steps.parse-release.outputs.release_version }}^1...v${{ steps.parse-release.outputs.release_version }}
+            Compare: ${{ env.GITHUB_SERVER_URL }}/${{ env.GITHUB_REPOSITORY }}/compare/v${{ steps.parse-release.outputs.release_version }}^1...v${{ steps.parse-release.outputs.release_version }}
 
-            @adamiBs @yossigo @adobrzhansky @maxb-io @dagansandler @Peter-Sh
+            ${{ env.PR_USER_MENTIONS }}
 
       - name: PR creation results
         run: |