Fix doctest

Author: IvanIsCoding

README.md

@@ -213,7 +213,7 @@ pixi exec celq -n '"Hello World"'
 
 celq can be used with [mise](https://mise.jdx.dev/). To install celq, use the Conda back-end:
 
-```
+```bash
 mise use -g conda:celq
 ```
 

docs/installation_guide.md

@@ -223,7 +223,7 @@ pixi exec celq -n '"Hello World"'
 
 celq can be used with [mise](https://mise.jdx.dev/). To install celq, use the Conda back-end:
 
-```
+```bash
 mise use -g conda:celq
 ```