Update and rename 0027-BlameCollector-Hang-Detection.md to 0028-BlameCollector-Hang-Detection.md

RFCs/0028-BlameCollector-Hang-Detection.md

@@ -1,4 +1,4 @@
-# 0027 Blame collector hang detection
+# 0028 Blame collector hang detection
 
 ## Summary
 Blame data collector now supports a new mode meant to help detect and fix hangs in test code. This mode does not introduce any perf hit on the test run as the proc dump process is only started after the specified timeout interval has elapsed.