Bazel/Go: be more specific in go/extractor/BUILD.bazel comments

Author: redsun82

go/extractor/BUILD.bazel

@@ -4,7 +4,7 @@ load("@rules_pkg//pkg:mappings.bzl", "pkg_files")
 # gazelle:prefix github.com/github/codeql-go/extractor
 # gazelle:map_kind go_binary codeql_go_binary //go:rules.bzl
 
-# following target is kept up to date by `bazel run //go:gen`, do not edit directly
+# the immediately following `extractor` target is kept up to date by `bazel run //go:gen`, do not edit directly
 go_library(
     name = "extractor",
     srcs = [
@@ -25,6 +25,7 @@ go_library(
     ],
 )
 
+# notice that these other targets are not generated
 java_library(
     name = "tokenizer-deps",
     srcs = [