Bump jcstress-core from 0.12 to 0.13

Bumps [jcstress-core](https://github.com/openjdk/jcstress) from 0.12 to 0.13.
- [Release notes](https://github.com/openjdk/jcstress/releases)
- [Commits](openjdk/jcstress@0.12...0.13)

---
updated-dependencies:
- dependency-name: org.openjdk.jcstress:jcstress-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

exist-core-jcstress/pom.xml

@@ -42,7 +42,7 @@
         <dependency>
             <groupId>org.openjdk.jcstress</groupId>
             <artifactId>jcstress-core</artifactId>
-            <version>0.12</version>
+            <version>0.13</version>
         </dependency>
         <dependency>
             <groupId>org.exist-db</groupId>