Bump org.bouncycastle:bcprov-jdk18on

Bumps [org.bouncycastle:bcprov-jdk18on](https://github.com/bcgit/bc-java) from 1.78.1 to 1.84.
- [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: '1.84'
  dependency-type: direct:production
...

See gh-50101

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

Author: dependabot[bot]

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/intTest/projects/war-signed/pom.xml

@@ -57,7 +57,7 @@
 		<dependency>
 			<groupId>org.bouncycastle</groupId>
 			<artifactId>bcprov-jdk18on</artifactId>
-			<version>1.78.1</version>
+			<version>1.84</version>
 		</dependency>
 	</dependencies>
 </project>