build(deps): bump org.bouncycastle:bcprov-jdk18on from 1.78 to 1.81

Bumps [org.bouncycastle:bcprov-jdk18on](https://github.com/bcgit/bc-java) from 1.78 to 1.81.
- [Changelog](https://github.com/bcgit/bc-java/blob/main/docs/releasenotes.html)
- [Commits](https://github.com/bcgit/bc-java/commits)

---
updated-dependencies:
- dependency-name: org.bouncycastle:bcprov-jdk18on
  dependency-version: '1.81'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

athena-federation-sdk/pom.xml

@@ -217,7 +217,7 @@
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk18on</artifactId>
-            <version>1.78</version>
+            <version>1.81</version>
         </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>