fix yolo+server install command (#99)

spaces are not allowed between extras for pip (without enclosing entire requirement in quotes)

Author: bfineran

src/content/get-started/install/deepsparse.mdx

@@ -38,5 +38,5 @@ To use YOLO models, install with the following extra option:
 
 ```bash
 pip install deepsparse[yolo]         # just yolo requirements
-pip install deepsparse[yolo, server] # both yolo + server requirements
+pip install deepsparse[yolo,server] # both yolo + server requirements
 ```