Bump MSRV to 1.81.0.

This is required to build the latest version of flip-link, which is used
in our CI.

Author: qwandor

.github/workflows/ci.yaml

@@ -28,7 +28,7 @@ jobs:
           # Note this needs to be new enough to build the examples as well as
           # the library itself.
           - name: MSRV
-            rust: 1.79.0
+            rust: 1.81.0
 
     name: "build (${{ matrix.name || matrix.rust }})"
 

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## [Unreleased]
 
 - Remove dead link to microbit Rust on Windows blog post in README.
+- Bumped MSRV to 1.81.0.
 
 ## [0.15.1] - 2024-08-05