chore(deps): bump com.google.crypto.tink:tink from 1.20.0 to 1.21.0

Bumps [com.google.crypto.tink:tink](https://github.com/tink-crypto/tink-java) from 1.20.0 to 1.21.0.
- [Release notes](https://github.com/tink-crypto/tink-java/releases)
- [Commits](tink-crypto/tink-java@v1.20.0...v1.21.0)

---
updated-dependencies:
- dependency-name: com.google.crypto.tink:tink
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -237,7 +237,7 @@
 		<dependency>
 			<groupId>com.google.crypto.tink</groupId>
 			<artifactId>tink</artifactId>
-			<version>1.20.0</version>
+			<version>1.21.0</version>
 			<optional>true</optional>
 		</dependency>
 		<dependency>