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

Co-authored-by: bjorn3 <bjorn3@users.noreply.github.com>

Author: m-ou-se

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

@@ -113,7 +113,7 @@ warning: identifier pair considered confusable between `ｓ` and `s`
 
 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 main branch is called `main`.
+from a repository where the default branch is called `main`.
 
 ### Stabilized APIs