CI: Bump tested rust version

Author: psibi

.github/workflows/test.yml

@@ -38,7 +38,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.76.0
+          toolchain: 1.80.1
           components: clippy, rustfmt
 
       - name: Run tests

README.md

@@ -341,7 +341,7 @@ rust-mode:
   (setq rust-mode-treesitter-derive t))
 ```
 
-And make to have rustic load after rust-mode:
+And then make sure to have rustic load after rust-mode:
 
 ``` emacs-lisp
 (use-package rustic