Merge remote-tracking branch 'origin/dependabot/gradle/modules/mysql/mysql-mysql-connector-java-8.0.28' into combined-pr-branch

Author: rnorth

modules/mysql/build.gradle

@@ -10,7 +10,7 @@ dependencies {
     compileOnly 'dev.miku:r2dbc-mysql:0.8.2.RELEASE'
 
     testImplementation project(':jdbc-test')
-    testImplementation 'mysql:mysql-connector-java:8.0.27'
+    testImplementation 'mysql:mysql-connector-java:8.0.28'
 
     testImplementation testFixtures(project(':r2dbc'))
     testImplementation 'dev.miku:r2dbc-mysql:0.8.2.RELEASE'