chore: bump @npmcli/template-oss from 4.19.0 to 4.21.0

Bumps [@npmcli/template-oss](https://github.com/npm/template-oss) from 4.19.0 to 4.21.0.
- [Release notes](https://github.com/npm/template-oss/releases)
- [Changelog](https://github.com/npm/template-oss/blob/main/CHANGELOG.md)
- [Commits](npm/template-oss@v4.19.0...v4.21.0)

---
updated-dependencies:
- dependency-name: @npmcli/template-oss
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "@npmcli/eslint-config": "^4.0.0",
-    "@npmcli/template-oss": "4.19.0",
+    "@npmcli/template-oss": "4.21.0",
     "tap": "^16.0.0"
   },
   "license": "ISC",