Minor name tweak

First column name was showing "Column1" instead of "Category", also changed H2 to Limits

Author: AlexFilipin

articles/active-directory/governance/understanding-lifecycle-workflows.md

@@ -33,10 +33,10 @@ For delegated scenarios, the admin needs one of the following [Azure AD roles](/
 - Global reader
 - Lifecycle workflows administrator
 
-## Restrictions
+## Limits
 
 
-|Column1  |Limit  |
+|Category  |Limit  |
 |---------|---------|
 |Number of Workflows     |   50 per tenant      |
 |Number of Tasks     |  25 per workflow       |