Bump com.mysql:mysql-connector-j from 9.6.0 to 26.7.0 in /modules/tidb

Bumps [com.mysql:mysql-connector-j](https://github.com/mysql/mysql-connector-j) from 9.6.0 to 26.7.0.
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/trunk/CHANGES)
- [Commits](mysql/mysql-connector-j@9.6.0...26.7.0)

---
updated-dependencies:
- dependency-name: com.mysql:mysql-connector-j
  dependency-version: 26.7.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

modules/tidb/build.gradle

@@ -4,6 +4,6 @@ dependencies {
     api project(':testcontainers-jdbc')
 
     testImplementation project(':testcontainers-jdbc-test')
-    testRuntimeOnly 'com.mysql:mysql-connector-j:9.6.0'
+    testRuntimeOnly 'com.mysql:mysql-connector-j:26.7.0'
     compileOnly 'org.jetbrains:annotations:26.1.0'
 }