migration guide

MIGRATION_GUIDE.md

@@ -22,9 +22,14 @@ Looking to upgrade from Sentry SDK 2.x to 3.x? Here's a comprehensive list of wh
 - The `sampling_context` argument of `traces_sampler` now additionally contains all span attributes known at span start.
 - The `sampling_context` argument of `traces_sampler` doesn't contain the `wsgi_environ` object anymore for WSGI frameworks. Instead, the individual properties on the environment are accessible, if available, as follows:
 
-  | Env property | Sampling context key(s) |
-  | ------------ | ----------------------- |
-  # TODO
+  | Env property | Sampling context key      |
+  | ------------ | ------------------------- |
+  | `PATH_INFO`  | `url.path`                |
+  | `QUERY_STRING` | `url.query`             |
+  | `REQUEST_METHOD` | `http.request.method` |
+  | `SERVER_NAME` | `server.address`         |
+  | `SERVER_PORT` | `server.port`            |
+  | `wsgi.url_scheme` | `url.scheme`         |
 
 - The `sampling_context` argument of `traces_sampler` doesn't contain the `asgi_scope` object anymore for ASGI frameworks. Instead, the individual properties on the scope, if available, are accessible as follows: