docs: align content with parent paragraph (#7488)

book/src/install.md

@@ -175,19 +175,19 @@ RUSTFLAGS="-C target-feature=-crt-static"
 
 1. Clone the repository:
 
-```sh
+   ```sh
-git clone https://github.com/helix-editor/helix
+   git clone https://github.com/helix-editor/helix
-cd helix
+   cd helix
-```
+   ```
 
 2. Compile from source:
 
-```sh
+   ```sh
-cargo install --path helix-term --locked
+   cargo install --path helix-term --locked
-```
+   ```
 
-This command will create the `hx` executable and construct the tree-sitter
+   This command will create the `hx` executable and construct the tree-sitter
-grammars in the local `runtime` folder.
+   grammars in the local `runtime` folder.
 
 > 💡 Tree-sitter grammars can be fetched and compiled if not pre-packaged. Fetch
 > grammars with `hx --grammar fetch` and compile them with