Bump mysql-connector-java in /modules/junit-jupiter

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.25 to 8.0.26.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](mysql/mysql-connector-j@8.0.25...8.0.26)

---
updated-dependencies:
- dependency-name: mysql:mysql-connector-java
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

modules/junit-jupiter/build.gradle

@@ -16,7 +16,7 @@ dependencies {
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.7.2'
 
     testRuntimeOnly 'org.postgresql:postgresql:42.2.22'
-    testRuntimeOnly 'mysql:mysql-connector-java:8.0.25'
+    testRuntimeOnly 'mysql:mysql-connector-java:8.0.26'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.2'
 }