chore: Bump org.bouncycastle:bcprov-jdk18on 1.84 -> 1.85 for CVE-2026-59638.

[craftmaster2190]

https://www.cve.org/CVERecord?id=CVE-2026-59638

Contributor Checklist

• Added relevant integration or unit tests to verify the changes
• Update the Readme or any other documentation (including relevant Javadoc)
• Ensured that tests pass locally: mvn clean package
• Ensured that the code meets the current checkstyle coding style definition: mvn clean verify -Pcheckstyle -Dmaven.test.skip=true -B

[edwardsre]

We are using the git-commit-id-maven-plugin:9.2.0 via Spring Boot 4.1.0. That plugin version is using bouncy castle version 1.81.