Shorten changelog

Author: hannesa2

.github/changelog-configuration.json

@@ -27,6 +27,6 @@
   ],
   "sort": "ASC",
   "template": "${{CHANGELOG}}",
-  "pr_template": "- ${{TITLE}}\n   - PR: #${{NUMBER}}",
+  "pr_template": "- ${{TITLE}} #${{NUMBER}}",
   "empty_template": "- no changes"
 }