chore: improve markdown formatting (#8825)

fixes:

![Screenshot_2024-08-25_16-25-30](https://github.com/user-attachments/assets/c993309b-6c2d-4938-9fd0-ce0953fc63ff)

fixes:

![Screenshot_2024-08-25_16-26-29](https://github.com/user-attachments/assets/cf497f4a-d9e3-45a6-a1a5-7e215d96d022)

proxy/README.md

@@ -36,7 +36,7 @@ To play with it locally one may start proxy over a local postgres installation
 ```
 
 If both postgres and proxy are running you may send a SQL query:
-```json
+```console
 curl -k -X POST 'https://proxy.localtest.me:4444/sql' \
   -H 'Neon-Connection-String: postgres://stas:pass@proxy.localtest.me:4444/postgres' \
   -H 'Content-Type: application/json' \
@@ -44,7 +44,8 @@ curl -k -X POST 'https://proxy.localtest.me:4444/sql' \
     "query":"SELECT $1::int[] as arr, $2::jsonb as obj, 42 as num",
     "params":[ "{{1,2},{\"3\",4}}", {"key":"val", "ikey":4242}]
   }' | jq
-
+```
+```json
 {
   "command": "SELECT",
   "fields": [