Avoid mentioning PR directly

There are proposed changes in the Process about simplifying the REC
track that if adopted would result in Proposed Recommendation being
retired as a maturity stage. The requirements to exit CR would remain
the same though.

This rephrasing recasts the criteria expect in order to enter PR in
terms of exiting CR instead. This is strictly equivalent, but avoids
mentioning PR by name, making this language more forward compatible with
this potential upcoming Process change.

charter-template.html

@@ -255,8 +255,8 @@ <h3>Timeline</h3>
 	  <h2>Success Criteria</h2>
 
     <!-- Testing and interop -->
-	  <p><span class='todo'>Remove this clause if the Group does not intend to move to REC:</span> In order to advance to
-		  <a href="https://www.w3.org/policies/process/#RecsPR" title="Proposed Recommendation">Proposed Recommendation</a>, each normative specification is expected to have
+	  <p><span class='todo'>Remove this clause if the Group does not intend to move to REC:</span> In order to advance beyond
+		  <a href="https://www.w3.org/policies/process/#RecsCR" title="Candidate Recommendation">Candidate Recommendation</a>, each normative specification is expected to have
 		  <a href="https://www.w3.org/policies/process/#implementation-experience">at least two independent interoperable
 			  implementations</a> of every feature defined in the specification, where
 interoperability can be verified by passing open test suites.</p>