Trigger release workflow on changes to itself (#117)

Add .github/workflows/release.yml to the paths filter so the workflow
also runs when the release workflow file itself is modified.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: arnaudleclerc

.github/workflows/release.yml

@@ -9,6 +9,7 @@ on:
       - main
     paths:
       - src/**
+      - .github/workflows/release.yml
 
 jobs:
   build: