Update README.md

README.md

@@ -155,7 +155,7 @@ stats:
       subtitle: Sensors
   cleaning:
     - attribute: cleaned_area
-      unit: m²
+      unit: m2
       subtitle: Cleaned area
     - attribute: cleaning_time
       unit: min
@@ -284,4 +284,4 @@ To submit your changes please fork this repository and open a pull request.
 
 
 <a href='https://ko-fi.com/tasshack' target='_blank'><img height='36' style='border:0px;height:36px;' src='https://storage.ko-fi.com/cdn/kofi3.png?v=3' border='0' alt='Buy Me a Coffee at ko-fi.com' /></a>
-<a href="https://paypal.me/tasshackK" target="_blank"><img src="https://www.paypalobjects.com/webstatic/mktg/logo/pp_cc_mark_37x23.jpg" border="0" alt="PayPal Logo" style="height: auto !important;width: auto !important;"></a>
+<a href="https://paypal.me/tasshackK" target="_blank"><img src="https://www.paypalobjects.com/webstatic/mktg/logo/pp_cc_mark_37x23.jpg" border="0" alt="PayPal Logo" style="height: auto !important;width: auto !important;"></a>