add hubProvider guide for zerolog (#12248)

Author: ribice

docs/platforms/go/guides/zerolog/index.mdx

@@ -109,6 +109,21 @@ WithBreadcrumbs bool
 FlushTimeout time.Duration
 ```
 
+- Using `hubProvider` for Scoped Sentry Hubs
+
+The hubProvider allows you to configure the Sentry hook to use a custom Sentry hub. This can be particularly useful when you want to scope logs to specific goroutines or operations, enabling more precise grouping and context in Sentry.
+
+You can set a custom hubProvider function using the SetHubProvider method:
+
+```go
+sentryHook.SetHubProvider(func() *sentry.Hub {
+    // Create or return a specific Sentry hub
+    return sentry.NewHub(sentry.GetCurrentHub().Client(), sentry.NewScope())
+})
+```
+
+This ensures that logs from specific contexts or threads use the appropriate Sentry hub and scope.
+
 ## Usage
 
 Use Zerolog as you normally would, and it will automatically send logs at or above the specified levels to Sentry.