Bump jcstress-core from 0.6 to 0.7

Bumps [jcstress-core](https://github.com/openjdk/jcstress) from 0.6 to 0.7.
- [Release notes](https://github.com/openjdk/jcstress/releases)
- [Commits](openjdk/jcstress@0.6...0.7)

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

exist-core-jcstress/pom.xml

@@ -42,7 +42,7 @@
         <dependency>
             <groupId>org.openjdk.jcstress</groupId>
             <artifactId>jcstress-core</artifactId>
-            <version>0.6</version>
+            <version>0.7</version>
         </dependency>
         <dependency>
             <groupId>org.exist-db</groupId>