docs: use syntax highlighting

See kafbat/ui-docs#49 also

Author: yeikel

README.md

@@ -99,7 +99,7 @@ To run Kafbat UI, you can use either a pre-built Docker image or build it (or a
 
 ## Quick start (Demo run)
 
-```
+```bash
 docker run -it -p 8080:8080 -e DYNAMIC_CONFIG_ENABLED=true ghcr.io/kafbat/kafka-ui
 ```
 
@@ -109,7 +109,7 @@ The command is sufficient to try things out. When you're done trying things out,
 
 ## Persistent installation
 
-```
+```yml
 services:
   kafbat-ui:
     container_name: kafbat-ui