Bump org.testcontainers:mariadb from 1.20.3 to 1.20.4

Bumps [org.testcontainers:mariadb](https://github.com/testcontainers/testcontainers-java) from 1.20.3 to 1.20.4.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.20.3...1.20.4)

---
updated-dependencies:
- dependency-name: org.testcontainers:mariadb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -189,7 +189,7 @@ dependencies {
 
   testImplementation("junit-addons:junit-addons:1.4")
   testImplementation("org.testcontainers:junit-jupiter:1.20.3")
-  testImplementation("org.testcontainers:mariadb:1.20.3")
+  testImplementation("org.testcontainers:mariadb:1.20.4")
 
   codacy("com.github.codacy:codacy-coverage-reporter:13.13.13")
 }