Fix tag names

Author: kesmit13

.github/workflows/release-samples.yml

@@ -29,7 +29,8 @@ jobs:
         id: tag_version
         uses: mathieudutour/github-tag-action@v6.2
         with:
-          custom_tag: ${{ env.DATETIME }}
+          custom_tag: v${{ env.DATETIME }}
+          tag_prefix: ""
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build notebooks