Update documented dependency versions

Author: marcphilipp

README.adoc

@@ -1,10 +1,10 @@
 = TestNG Engine for the JUnit Platform
 :jcommander-version: 1.72
 :jquery-version: 3.5.1
-:junit-platform-version: 1.7.2
-:surefire-version: 3.0.0-M5
+:junit-platform-version: 1.8.2
+:surefire-version: 3.0.0-M7
 :testng-min-version: 6.14.3
-:testng-max-version: 7.4.0
+:testng-max-version: 7.5
 :testng-engine-version: 1.0.2
 
 Allows executing https://testng.org[TestNG] tests on the JUnit Platform

build.gradle.kts

@@ -45,7 +45,7 @@ val supportedTestNGVersions = listOf(
     "7.1.0",
     "7.3.0",
     "7.4.0",
-    "7.5" // Keep in sync with TestContext.java
+    "7.5" // Keep in sync with TestContext.java and README.MD
 ).map(::Version)
 val snapshotTestNGVersion = Version("7.6.0-SNAPSHOT")