Add link to pr for documentation

DJMcNab · DJMcNab · commit 6106ee214c46 · 2021-03-09T18:27:22.000Z
diff --git a/Cargo.toml b/Cargo.toml
@@ -42,5 +42,6 @@ rustc_version = "0.2.3"
 colored = "2"
 
 [package.metadata.rust-analyzer]
-# This crate uses #[feature(rustc_private)]
+# This crate uses #[feature(rustc_private)]. 
+# See https://github.com/rust-analyzer/rust-analyzer/pull/7891
 rustc_private = true
