add missing item to CHANGELOG

CHANGELOG.md

@@ -7,13 +7,19 @@ Coq development, but not every API-breaking change is listed.  Changes marked
 
 This version accompanies the final ICFP paper.
 
-* [# algebra] Make the core of an RA or CMRA a partial function.
+* [algebra] Make the core of an RA or CMRA a partial function.
 * [heap_lang] No longer use dependent types for expressions.  Instead, values
   carry a proof of closedness.  Substitution, closedness and value-ness proofs
   are performed by computation after reflecting into a term langauge that knows
   about values and closed expressions.
 * [program_logic/language] The language does not define its own "atomic"
   predicate.  Instead, atomicity is defined as reducing in one step to a value.
+* [# program_logic/lifting] Lifting lemmas no longer round-trip through a
+  user-chosen predicate to define the configurations we can reduce to; they
+  directly relate to the operational semantics.  This is equivalent and
+  much simpler to read.
+  Due to a lack of maintenance and usefulness, lifting lemmas for Hoare triples
+  are removed.
 
 ## Iris 2.0-rc1