Update docs/analytics/cloud.mdx

Co-authored-by: Robert Lin <robert@bobheadxi.dev>

Author: jac

docs/analytics/cloud.mdx

@@ -40,7 +40,7 @@ $ export CAS_COOKIE="<CAS_COOKIE_VALUE>"
 Create the token by running the following command:
 
 ```sh
-$ curl -X POST https://analytics.sourcegraph.com/api/service-access-tokens \
+curl -X POST https://analytics.sourcegraph.com/api/service-access-tokens \
   -H "Content-Type: application/json" \
   -H "Cookie: cas=$CAS_COOKIE" \
   -d '{}'