update linter io url

Change-Id: I7370957023f040800da99a5c0dafd8e1bd1c63eb
Reviewed-on: https://dart-review.googlesource.com/c/87021
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Phil Quitslund <pquitslund@google.com>
diff --git a/pkg/analyzer/README.md b/pkg/analyzer/README.md
index fc26165..d633684 100644
--- a/pkg/analyzer/README.md
+++ b/pkg/analyzer/README.md
@@ -98,7 +98,7 @@
 [serverapi]: https://htmlpreview.github.io/?https://github.com/dart-lang/sdk/blob/master/pkg/analysis_server/doc/api.html
 [dartanalyzer]: https://github.com/dart-lang/sdk/tree/master/pkg/analyzer_cli#dartanalyzer
 [list]: https://groups.google.com/a/dartlang.org/forum/#!forum/analyzer-discuss
-[lintrules]: http://dart-lang.github.io/linter/lints/
+[lintrules]: https://dart-lang.github.io/linter/lints/
 [glob]: https://pub.dartlang.org/packages/glob
 [LICENSE]: https://github.com/dart-lang/sdk/blob/master/pkg/analyzer/LICENSE
 [dartfmt]: https://github.com/dart-lang/dart_style