Update content/shared/influxdb3-admin/distinct-value-cache/show.md

Co-authored-by: Jason Stirnaman <stirnamanj@gmail.com>

content/shared/influxdb3-admin/distinct-value-cache/show.md

@@ -82,9 +82,8 @@ To use the HTTP API to query and output cache information from the system table,
 
 ```bash
 curl -X POST "https://localhost:8181/api/v3/query_sql" \
-  -H "Authorization: Bearer AUTH_TOKEN" \
-  -H "Content-Type: application/json" \
-  -d '{
+  --header "Authorization: Bearer AUTH_TOKEN" \
+  --json '{
     "db": "DATABASE_NAME",
     "q": "SELECT * FROM system.distinct_caches",
     "format": "json"