scripts: csdl-to-json-converter: README.md: Fix MD040 warnings

The following warnings are generated by using markdownlint analysis:
```
MD040/fenced-code-language Fenced code blocks should have a language specified [Context: "```"]
```
Refer to markdown-lint [1] to fix MD040
[1]: https://github.com/updownpress/markdown-lint/blob/master/rules/040-fenced-code-language.md

Signed-off-by: George Liu <liuxiwei@ieisystem.com>
Change-Id: I183c4e220b7fdcec9c235a04dcdd9b4f065863e8
diff --git a/scripts/csdl-to-json-converter/README.md b/scripts/csdl-to-json-converter/README.md
index 94e9e40..424355a 100644
--- a/scripts/csdl-to-json-converter/README.md
+++ b/scripts/csdl-to-json-converter/README.md
@@ -6,7 +6,7 @@
 To update the config files, run the following command, updating the paths to be
 correct on your machine.
 
-```
+```bash
 python3 ~/Redfish-Tools/csdl-to-json-convertor/csdl-to-json.py --input ~/bmcweb/redfish-core/schema/oem/openbmc/csdl --output ~/bmcweb/redfish-core/schema/oem/openbmc/json-schema --config ~/bmcweb/scripts/csdl-to-json-converter/csdl-to-json-convertor/openbmc-config.json
 ```