Bump org.bouncycastle:bcprov-jdk18on from 1.80 to 1.81 (#928)

Bumps [org.bouncycastle:bcprov-jdk18on](https://github.com/bcgit/bc-java) 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
...

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Author: dependabot[bot]

build.gradle.kts

@@ -65,7 +65,7 @@ dependencies {
     }
     implementation("com.github.mwiede:jsch:$jschVersion")
     implementation("com.github.zafarkhaja:java-semver:0.9.0")
-    runtimeOnly("org.bouncycastle:bcprov-jdk18on:1.80")
+    runtimeOnly("org.bouncycastle:bcprov-jdk18on:1.81")
     runtimeOnly("com.kohlschutter.junixsocket:junixsocket-core:2.9.1")
     runtimeOnly("net.java.dev.jna:jna-platform:5.17.0")