fix singular casing of parameter in logs develop docs

Author: AbhiPrasad

develop-docs/sdk/telemetry/logs.mdx

@@ -47,7 +47,7 @@ The `log` envelope item payload is a JSON object that represents a Sentry Log.
       "value": "User %s has logged in!",
       "type": "string"
     },
-    "sentry.message.parameters.0": {
+    "sentry.message.parameter.0": {
       "value": "John",
       "type": "string"
     },