reword the -Xdoclint comment in build.gradle.kts

The doclint groups add checks Error Prone lacks. The old comment said no
group repeats an Error Prone check, but the syntax group overlaps with
MalformedInlineTag.

Author: ThoSap

build.gradle.kts

@@ -73,7 +73,7 @@ subprojects {
         options.compilerArgs.add("-Xlint:deprecation,removal,unchecked,cast,rawtypes,divzero,this-escape,identity,text-blocks,dangling-doc-comments,restricted")
         // The build itself: command-line options, path entries, output file collisions
         options.compilerArgs.add("-Xlint:options,path,output-file-clash")
-        // Javadoc comments: no group repeats an Error Prone check, and `missing` floods on generated code
+        // Javadoc comments: the groups add checks Error Prone lacks, and `missing` floods on generated code
         options.compilerArgs.add("-Xdoclint:all,-missing")
 
         options.errorprone {