Bump com.redis:testcontainers-redis from 2.0.1 to 2.2.2

Bumps [com.redis:testcontainers-redis](https://github.com/redis-developer/testcontainers-redis-build) from 2.0.1 to 2.2.2.
- [Commits](https://github.com/redis-developer/testcontainers-redis-build/commits)

---
updated-dependencies:
- dependency-name: com.redis:testcontainers-redis
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

synapse-redis/build.gradle

@@ -25,7 +25,7 @@ dependencies {
     testImplementation "ch.qos.logback:logback-core"
     testImplementation "ch.qos.logback:logback-classic"
     testImplementation "org.testcontainers:testcontainers"
-    testImplementation "com.redis:testcontainers-redis:2.0.1"
+    testImplementation "com.redis:testcontainers-redis:2.2.2"
 }
 
 apply plugin: 'maven-publish'