Merge pull request #895 from pietroalbini/1.56-pre

Add post about 1.56.0 pre-release testing

Author: pietroalbini

posts/inside-rust/2021-10-18-1.56.0-prerelease.md

@@ -0,0 +1,21 @@
+---
+layout: post
+title: "1.56.0 pre-release testing"
+author: Pietro Albini
+team: The Release Team <https://www.rust-lang.org/governance/teams/release>
+---
+
+The 1.56.0 pre-release is ready for testing. The release is scheduled for this
+Thursday, October 21th. [Release notes can be found here.][relnotes]
+
+You can try it out locally by running:
+
+```plain
+RUSTUP_DIST_SERVER=https://dev-static.rust-lang.org rustup update stable
+```
+
+The index is <https://dev-static.rust-lang.org/dist/2021-10-18/index.html>. You
+can leave feedback on the [internals thread][internals].
+
+[relnotes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1560-2021-10-21
+[internals]: https://internals.rust-lang.org/t/rust-1-56-0-pre-release-testing/15459