ci: remove force-tag-creation from attestation-only repo

force-tag-creation only operates in conjunction with draft releases.
Since this repo does not use draft releases (attestation-only, no
artifact uploads to the release), force-tag-creation is not needed.

Author: keelerm84

release-please-config.json

@@ -8,8 +8,7 @@
         "ldclient/version.py",
         "PROVENANCE.md"
       ],
-      "include-component-in-tag": false,
-      "force-tag-creation": true
+      "include-component-in-tag": false
     }
   }
 }