Update limitations

Author: lukaszsamson

docs/known-issues-limitations.md

@@ -5,3 +5,5 @@
 * Debugger doesn't work in Elixir 1.10.0 - 1.10.2 (but it should work in 1.10.3 when [this fix](https://github.com/elixir-lang/elixir/pull/9864) is released)
 * "Go to definition" does not work within the `scope` of a Phoenix router
 * On first launch dialyzer will cause high CPU usage for a considerable time
+* Dialyzer does not pick up changes involving remote types (https://github.com/elixir-lsp/elixir-ls/issues/502)
+*