Use darker gray color for system note metadata and edited text

app/assets/stylesheets/pages/issuable.scss

@@ -594,18 +594,18 @@
   padding: 16px 0;
 
   small {
-    color: $gray-darkest;
+    color: $gray-700;
   }
 }
 
 .edited-text {
-  color: $gray-darkest;
+  color: $gray-700;
   display: block;
   margin: 16px 0 0;
   font-size: 85%;
 
   .author-link {
-    color: $gray-darkest;
+    color: $gray-700;
   }
 }
 

app/assets/stylesheets/pages/notes.scss

@@ -628,7 +628,7 @@ $note-form-margin-left: 72px;
 
 .note-headline-meta {
   .system-note-separator {
-    color: $gl-text-color-disabled;
+    color: $gray-700;
   }
 
   .note-timestamp {

changelogs/unreleased/62938-wcag-aa-edited-text-color.yml

+---
+title: Use darker gray color for system note metadata and edited text
+merge_request: 30054
+author:
+type: other