Bump org.bouncycastle:bcprov-jdk18on from 1.77 to 1.78

Bumps [org.bouncycastle:bcprov-jdk18on](https://github.com/bcgit/bc-java) from 1.77 to 1.78.
- [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] <support@github.com>

build.gradle.kts

@@ -25,7 +25,7 @@ dependencies {
     implementation("com.google.guava:guava:33.1.0-jre")
     implementation("com.google.zxing:core:3.5.3")
     implementation("com.google.zxing:javase:3.5.3")
-    implementation("org.bouncycastle:bcprov-jdk18on:1.77")
+    implementation("org.bouncycastle:bcprov-jdk18on:1.78")
     implementation("org.eclipse.angus:jakarta.mail:2.0.3")
     implementation("org.eclipse.parsson:jakarta.json:1.1.6")
 }