Update publish.yml

Upgrade to rlespinasse/github-slug-action@v3.x

Author: asarkar

.github/workflows/publish.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Inject slug/short variables
-        uses: rlespinasse/github-slug-action@v2.x
+        uses: rlespinasse/github-slug-action@v3.x
 
       - name: Check CI status
         run: |