Update permissions in test-proxy workflow to allow issue reporting

Signed-off-by: Jiaxiao Zhou <duibao55328@gmail.com>

Author: Mossaka

.github/workflows/test-proxy.lock.yml

@@ -5,7 +5,8 @@ on:
   workflow_dispatch:
 
 permissions:
-  contents: read
+  issues: write # needed to write the output report to an issue
+
 tools:
   fetch:
     mcp: