Bump com.gradle.publish:plugin-publish-plugin from 1.1.0 to 1.2.1

Bumps com.gradle.publish:plugin-publish-plugin from 1.1.0 to 1.2.1.

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

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

build.gradle

@@ -6,7 +6,7 @@ buildscript {
     dependencies {
         classpath "org.shipkit:shipkit-auto-version:1.+"
         classpath "org.shipkit:shipkit-changelog:1.+"
-        classpath "com.gradle.publish:plugin-publish-plugin:1.1.0"
+        classpath "com.gradle.publish:plugin-publish-plugin:1.2.1"
     }
 }