docs(python): Document set_tags function

Add documentation for the [new `set_tags` function](getsentry/sentry-python#2978) in the Python SDK.

Closes GH-9703

docs/platforms/python/enriching-events/tags/index.mdx

@@ -13,10 +13,18 @@ _Tag values_ have a maximum length of 200 characters and they cannot contain the
 
 Defining tags is easy, and will bind them to the [current scope](../scopes/) ensuring all future events within scope contain the same tags.
 
-Define the tag:
+Tags can be set with the `set_tag` function:
 
 <PlatformContent includePath="enriching-events/set-tag" />
 
+Alternatively, multiple tags can be set at once with the `set_tags` function:
+
+```python
+from sentry_sdk import set_tags
+
+set_tags({"page.locale": "de-at", "page.type": "article"})
+```
+
 <Note>
 
 Some tags are automatically set by Sentry. We strongly recommend against overwriting these [tags](/product/reference/search/searchable-properties/#search-properties). Instead, name your tags with your organization's nomenclature. If you overwrite an automatically set tag, you must use [explicit tag syntax](/product/reference/search/#explicit-tag-syntax) to search for it.