Update develop docs data handling section for new APIs (#12347)

Author: mydea

develop-docs/sdk/expected-features/data-handling.mdx

@@ -63,12 +63,16 @@ This helps Relay to know what kind of data it receives and this helps with scrub
   If query strings are present in the URL or fragments (Browser SDKs only) are present in the URI, both are set into the data attribute of the span.
 
   ```js
-  span.setData({
+  span.setAttributes({
     "http.query": url.getQuery(),
     "http.fragment": uri.getFragment(),
   });
   ```
 
+  ```python
+  span.set_data("http.query", query)
+  ```
+
   Additionally all semantic conventions of OpenTelementry for http spans should be set in the `span.data` if applicable:
   https://opentelemetry.io/docs/reference/specification/trace/semantic_conventions/http/
 
@@ -86,7 +90,7 @@ If the `message` in a breadcrumb contains an URL it should be formatted the same
 If query strings are present in the URL or fragments (Browser SDKs only) are present in the URI, both should also be set in the data attribute like with `http` spans.
 
 ```js
-getCurrentHub().addBreadcrumb({
+Sentry.addBreadcrumb({
   type: "http",
   category: "xhr",
   data: {