Bump dev.sigstore:sigstore-maven-plugin from 2.0.0 to 2.1.0

Bumps [dev.sigstore:sigstore-maven-plugin](https://github.com/sigstore/sigstore-java) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/sigstore/sigstore-java/releases)
- [Changelog](https://github.com/sigstore/sigstore-java/blob/main/CHANGELOG.md)
- [Commits](sigstore/sigstore-java@v2.0.0...v2.1.0)

---
updated-dependencies:
- dependency-name: dev.sigstore:sigstore-maven-plugin
  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]

pom.xml

@@ -91,7 +91,7 @@
     <maven-release-plugin.version>3.3.1</maven-release-plugin.version>
     <maven-gpg-plugin.version>3.2.8</maven-gpg-plugin.version>
     <central-publishing-maven-plugin.version>0.10.0</central-publishing-maven-plugin.version>
-    <sigstore-maven-plugin.version>2.0.0</sigstore-maven-plugin.version>
+    <sigstore-maven-plugin.version>2.1.0</sigstore-maven-plugin.version>
     <spdx-maven-plugin.version>1.0.3</spdx-maven-plugin.version>
     <maven-license-plugin.version>2.7.1</maven-license-plugin.version>