fix: Workflow does not contain permissions (#20)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: mattinannt

.github/workflows/publish-to-maven-central.yml

@@ -1,6 +1,8 @@
 # .github/workflows/publish-to-maven-central.yml
 
 name: Publish to Maven Central
+permissions:
+  contents: read
 on:
   release:
     types: [released]