Update 2021-06-17-Rust-1.53.0.md

Author: pnkfelix

posts/2021-06-17-Rust-1.53.0.md

@@ -116,6 +116,10 @@ Cargo no longer assumes the default `HEAD` of git repositories is named `master`
 This means you no longer need to specify `branch = "main"` for git dependencies
 from a repository where the default branch is called `main`.
 
+### Incremental Compilation remains off by default
+
+As previously discussed on the [blog post for version 1.52.1](/2021/05/10/Rust-1.52.1.html), incremental compilation has been turned off by default on the stable Rust release channel. The feature remains available on the beta and nightly release channels. For the stable release channel, you can explicitly opt into re-enabling incremental compilation via the `RUSTC_FORCE_INCREMENTAL=1` environment variable.
+
 ### Stabilized APIs
 
 The following methods and trait implementations were stabilized.