Bump org.bouncycastle:bcpkix-jdk18on from 1.76 to 1.78.1

Bumps [org.bouncycastle:bcpkix-jdk18on](https://github.com/bcgit/bc-java) from 1.76 to 1.78.1.
- [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:bcpkix-jdk18on
  dependency-version: 1.78.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -151,7 +151,7 @@
         <jwt.version>3.9.0</jwt.version>
         <okhttp.version>4.11.0</okhttp.version>
         <jgit.version>5.13.3.202401111512-r</jgit.version>
-        <bouncycastle.jdk18.version>1.76</bouncycastle.jdk18.version>
+        <bouncycastle.jdk18.version>1.78.1</bouncycastle.jdk18.version>
         <bouncycastle.jdk15.version>1.70</bouncycastle.jdk15.version>
         <commons-codec.version>1.15</commons-codec.version>
         <registry-prometheus.version>1.9.5</registry-prometheus.version>