Update README.md

highlight the config files

Author: hsyrja

cmd/gpu_fakedev/README.md

@@ -26,8 +26,8 @@ file, but each new device variant adding feature(s) that have specific
 support in device plugin, could have their own fake device config.
 
 Xelink support: There two ways to generate Xelink info.
-1. Use xelink-topology FULL: See example: config/8x2-PVC-xelink.json
-2. Use direct xelink connection line: See example: config/2x4-PVC-xelink.json
+1. Use xelink-topology FULL: See example: `config/8x2-PVC-xelink.json`
+2. Use direct xelink connection line: See example: `config/2x4-PVC-xelink.json`
 
 ## Potential improvements