Update config_entries_config_flow_handler.md (#1713)

Fix Markdown link

Author: minchinweb

docs/config_entries_config_flow_handler.md

@@ -167,7 +167,7 @@ To get started, run `python3 -m script.scaffold config_flow_discovery` and follo
 
 ## Configuration via OAuth2
 
-Home Assistant has built-in support for integrations that offer account linking using [the OAuth2 authorization framework]https://www.rfc-editor.org/rfc/rfc6749). To be able to leverage this, you will need to structure your Python API library in a way that allows Home Assistant to be responsible for refreshing tokens. See our [API library guide](api_lib_index.md) on how to do this.
+Home Assistant has built-in support for integrations that offer account linking using [the OAuth2 authorization framework](https://www.rfc-editor.org/rfc/rfc6749). To be able to leverage this, you will need to structure your Python API library in a way that allows Home Assistant to be responsible for refreshing tokens. See our [API library guide](api_lib_index.md) on how to do this.
 
 The built-in OAuth2 support works out of the box with locally configured client ID / secret using the [Application Credentials platform](/docs/core/platform/application_credentials) and with the Home Assistant Cloud Account Linking service. This service allows users to link their account with a centrally managed client ID/secret. If you want your integration to be part of this service, reach out to us at [[email protected]](mailto:[email protected]).