update wording for const stabilizations

pietroalbini · Mark-Simulacrum · commit 21ed8b35851a · 2025-05-09T18:18:59.000-04:00
diff --git a/templates/relnotes.md b/templates/relnotes.md
@@ -37,7 +37,7 @@ Stabilized APIs
 
 {{stabilized_apis_relnotes}}
 
-These APIs are now stable in const contexts:
+These previously stable APIs are now stable in const contexts:
 
 {{const_stabilized_apis_relnotes}}
 
