docs: update installation instructions

README.md

@@ -33,14 +33,24 @@ See `.cargo/config.toml` for how they are configured.
 
 ## Installation
 
-You can install `git-next` using Cargo:
+You can install `git-next` from <https://crates.io/>:
+
+```shell
+cargo install git-next
+```
+
+If you use [mise](https://mise.jdx.dev):
+
+```shell
+mise use -g cargo:git-next
+```
+
+Or you can install `git-next` from source after cloning:
 
 ```shell
 cargo install --path crates/cli
 ```
 
-Not yet available to install from `crates.io`.
-
 ## Roadmap
 
 - [x] cli