chore(deps): bump org.bouncycastle:bcpg-jdk18on from 1.78.1 to 1.81

Bumps [org.bouncycastle:bcpg-jdk18on](https://github.com/bcgit/bc-java) from 1.78.1 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:bcpg-jdk18on
  dependency-version: '1.81'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

mod/build.gradle.kts

@@ -183,7 +183,7 @@ dependencies {
     shadowMe("gg.skytils.hypixel.types:types") { excludeKotlin() }
     shadowMe("gg.skytils.skytilsws.shared:ws-shared") { excludeKotlin() }
 
-    shadowMe("org.bouncycastle:bcpg-jdk18on:1.78.1") {
+    shadowMe("org.bouncycastle:bcpg-jdk18on:1.81") {
         exclude(module = "bcprov-jdk18on")
     }
     compileOnly("org.bouncycastle:bcprov-jdk18on:1.78.1")