docs: Suggest rustup update in readme
@@ -42,7 +42,12 @@ git checkout tags/1.0.0 # or whatever the latest version is (find out at https:/
cargo install --force --path .
```
-Same as above, run `rustlings` to get started.
+If there are installation errors, ensure that your toolchain is up to date. For the latest, run:
+```bash
+rustup update
+```
+
+Then, same as above, run `rustlings` to get started.
## Doing exercises
