Bump bcprov-jdk15on from 1.69 to 1.70 (#8333)

Bumps [bcprov-jdk15on](https://github.com/bcgit/bc-java) from 1.69 to 1.70.
- [Release notes](https://github.com/bcgit/bc-java/releases)
- [Changelog](https://github.com/bcgit/bc-java/blob/master/docs/releasenotes.html)
- [Commits](https://github.com/bcgit/bc-java/commits)

---
updated-dependencies:
- dependency-name: org.bouncycastle:bcprov-jdk15on
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -124,7 +124,7 @@ dependencies {
     implementation group: 'org.apache.tika', name: 'tika-core', version: '2.1.0'
 
     // required for reading write-protected PDFs - see https://github.com/JabRef/jabref/pull/942#issuecomment-209252635
-    implementation 'org.bouncycastle:bcprov-jdk15on:1.69'
+    implementation 'org.bouncycastle:bcprov-jdk15on:1.70'
 
     implementation 'commons-cli:commons-cli:1.5.0'