chore(deps): bump bouncycastle.version from 1.80 to 1.81

Bumps `bouncycastle.version` from 1.80 to 1.81.

Updates `org.bouncycastle:bcprov-jdk18on` from 1.80 to 1.81
- [Changelog](https://github.com/bcgit/bc-java/blob/main/docs/releasenotes.html)
- [Commits](https://github.com/bcgit/bc-java/commits)

Updates `org.bouncycastle:bcpkix-jdk18on` from 1.80 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
- dependency-name: org.bouncycastle:bcpkix-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]

pom.xml

@@ -113,7 +113,7 @@
     <assertj.core.version>3.27.3</assertj.core.version>
     <awaitility.version>4.3.0</awaitility.version>
     <approvaltests.version>24.22.0</approvaltests.version>
-    <bouncycastle.version>1.80</bouncycastle.version>
+    <bouncycastle.version>1.81</bouncycastle.version>
     <bc-fips.version>2.1.0</bc-fips.version>
     <bcpkix-fips.version>2.1.9</bcpkix-fips.version>
     <keycloak.version>26.2.5</keycloak.version><!-- Used by CRD Generator integration tests for verifications -->