Update self.release.sts.yaml

Author: maxep

.github/chainguard/self.release.sts.yaml

@@ -1,6 +1,6 @@
 issuer: https://gitlab.ddbuild.io
 
-subject_pattern: "project_path:DataDog/dd-sdk-ios:ref_type:tag:ref:refs/tags/*"
+subject_pattern: "project_path:DataDog/dd-sdk-ios:ref_type:tag:ref:refs/tags/.*"
 
 claim_pattern:
   project_path: "DataDog/dd-sdk-ios"