fix: allow access to forked pull request labels

Release fails if pull request is from a fork currently because
we can't access the labels on the forked pull request which
helps us determine semver for next release.

Saw this after merging #283 (from a fork)

Add pull_request_target to release action workflow

I am not worried about the security implications with us checking
out the forked pull requests code.  This action only fires after
a merge to main so this means the pull request code has been reviewed
by a maintainer.  We are post-CI/code run.

Signed-off-by: jmeridth <[email protected]>

Author: jmeridth

.github/workflows/release.yml

@@ -8,6 +8,11 @@
         - closed
       branches:
         - main
+    pull_request_target:
+      types:
+        - closed
+      branches:
+        - main
 
   permissions:
     contents: read