Add reno

Author: ElePT

releasenotes/notes/fix-hls-clbits-6ddf1f8d1542eed2.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Fixed a bug in the :class:`.HighLevelSynthesis` pass where, if the circuit contained high level objects
+    with classical registers, these would get mapped to the relative index in the object instead of the
+    corresponding index in the outer circuit. The classical registers are now correctly mapped to the outer 
+    circuit index.