Fix TestsShouldIncludeAssertions docs as pointed out

src/main/java/org/openrewrite/java/testing/cleanup/TestsShouldIncludeAssertions.java

@@ -68,7 +68,7 @@ public String getDisplayName() {
 
     @Override
     public String getDescription() {
-        return "For tests not having any assertions, wrap the statements with JUnit Jupiter's `Assertions#assertThrowDoesNotThrow(..)`.";
+        return "For tests not having any assertions, wrap the statements with JUnit Jupiter's `Assertions#assertDoesNotThrow(..)`.";
     }
 
     @Override