build(deps): bump openpgp from 5.1.0 to 5.2.1

Bumps [openpgp](https://github.com/openpgpjs/openpgpjs) from 5.1.0 to 5.2.1.
- [Release notes](https://github.com/openpgpjs/openpgpjs/releases)
- [Commits](openpgpjs/openpgpjs@v5.1.0...v5.2.1)

---
updated-dependencies:
- dependency-name: openpgp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -27,7 +27,7 @@
     "@actions/exec": "^1.1.0",
     "@actions/github": "^5.0.0",
     "node-fetch": "^3.2.3",
-    "openpgp": "^5.1.0"
+    "openpgp": "^5.2.1"
   },
   "devDependencies": {
     "@types/jest": "^27.4.1",