build(deps): bump org.bouncycastle:bcprov-jdk18on from 1.76 to 1.78.1

Bumps [org.bouncycastle:bcprov-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:bcprov-jdk18on
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

zuul-core/build.gradle

@@ -6,7 +6,7 @@ dependencies {
     implementation libraries.guava
     // TODO(carl-mastrangelo): this can be implementation; remove Logger from public api points.
     api libraries.slf4j
-    implementation 'org.bouncycastle:bcprov-jdk18on:1.76'
+    implementation 'org.bouncycastle:bcprov-jdk18on:1.78.1'
     implementation 'org.bouncycastle:bcpkix-jdk18on:1.78.1'
     implementation 'com.fasterxml.jackson.core:jackson-core:2.16.1'
     api 'com.fasterxml.jackson.core:jackson-databind:2.16.1'