fix(serverless): curl -u syntax

Author: jstirnaman

content/influxdb3/cloud-serverless/guides/api-compatibility/v1/_index.md

@@ -97,7 +97,7 @@ The following example shows how to use cURL with the `Basic` authentication sche
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 curl "https://{{< influxdb/host >}}/query" \
-  --user "":"API_TOKEN" \
+  --user ":API_TOKEN" \
   --data-urlencode "db=DATABASE_NAME" \
   --data-urlencode "rp=RETENTION_POLICY" \
   --data-urlencode "q=SELECT * FROM MEASUREMENT"