[css-tables] Added additional line to the note per resolution. Fixes #473

Author: Greg Whitworth

css-tables-3/Overview.bs

@@ -630,6 +630,8 @@ spec:css21; type:property; text:max-width
 			The HTML Table Formatting algorithm sometimes generates more tracks than necessary to layout the table properly.
 			Those tracks have historically been ignored by user agents, 
 			so the next step just gets rid of them entirely to avoid dealing with them as exceptions later in the spec.
+			We have tried to maintain the functionality with this change, but if you happen to find any issues
+			due to this change please file an issue.
 
 		<p>
 			Modify iteratively the obtained grid by merging consecutive tracks as follows: