Bump com.gradle.plugin-publish from 2.0.0 to 2.1.0

Bumps com.gradle.plugin-publish from 2.0.0 to 2.1.0.

---
updated-dependencies:
- dependency-name: com.gradle.plugin-publish
  dependency-version: 2.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ bytebuddy = "1.18.5"
 # plugins
 updates = "0.53.0"
 build-plugins = "2026.1"
-pubplug = "2.0.0"
+pubplug = "2.1.0"
 
 [libraries]
 openapi-processor-api = { module = "io.openapiprocessor:openapi-processor-api", version.ref = "api" }