docs(rules): match exercise names to subject

subjects/user-experience/piscine-ui/rules/README.md

@@ -104,7 +104,7 @@ Don't forget to:
   - Error states.
   - etc.
 
-## Accessibility (App)
+## Accessibility (app)
 
 ### Instructions
 
@@ -142,7 +142,7 @@ Don't forget to:
   - Error states
   - etc.
 
-## Breadbcrumbs
+## Breadcrumbs
 
 ### Instructions
 
@@ -188,7 +188,7 @@ Don't forget to:
 
 - [Toggle Switch - Tips](https://uxplanet.org/toggle-switch-5-simple-design-tips-for-better-design-b4046eff4a2f)
 
-## Radio Buttons
+## Radio buttons
 
 ### Instructions
 

subjects/user-experience/piscine-ui/rules/audit/README.md

@@ -48,7 +48,7 @@
 
 **Example [here](https://www.convinceandconvert.com/digital-marketing/accessible-website-examples/).**
 
-#### Accessibility (App)
+#### Accessibility (app)
 
 ###### Is the deliverable labeled as “Name_FirstName_DeliverableName_Date_VersionNumber”?
 
@@ -66,7 +66,7 @@
 
 **Example [here](https://www.convinceandconvert.com/digital-marketing/accessible-website-examples/)**
 
-#### Breadbcrumbs
+#### Breadcrumbs
 
 ###### Is the deliverable labeled as “Name_FirstName_DeliverableName_Date_VersionNumber”?
 
@@ -94,7 +94,7 @@
 
 ###### Is the name of each app or website written?
 
-#### Radio Buttons
+#### Radio buttons
 
 ###### Is the deliverable labeled as “Name_FirstName_DeliverableName_Date_VersionNumber”?