doc updates

Author: dreed47

README.md

@@ -9,7 +9,7 @@
 
 <img src="https://raw.githubusercontent.com/home-assistant/brands/master/custom_integrations/redfin/logo.png" width="40%">
 
-### NB!: This component requires HA Core version 2021.6.0.dev0 or greater!
+### <span style="color:red">_This component requires HA Core version 2021.6.0.dev0 or greater!_</span>
 
 This is a _Custom Integration_ for [Home Assistant](https://www.home-assistant.io/). It uses the unofficial [Redfin](https://www.redfin.com) API to get property value estimates.
 

info.md

@@ -11,11 +11,11 @@
 
 {% if prerelease %}
 
-### NB!: This is a Beta version!
+### <span style="color:red">_This is a Beta version!_</span>
 
 {% endif %}
 
-### NB!: This component requires HA Core version 2021.6.0.dev0 or greater!
+### <span style="color:red">_This component requires HA Core version 2021.6.0.dev0 or greater!_</span>
 
 This is a _Custom Integration_ for [Home Assistant](https://www.home-assistant.io/). It uses the unofficial [Redfin](https://www.redfin.com) API to get property value estimates.