docs: restore GitHub handles in the #835 changelog credit

Recent fragments credit as name, handle and PR number; keep that form.

changelog.d/835-viewport-escalation-reasons.md

@@ -3,5 +3,5 @@
   the image step, the log records a reason-coded decision and, when an image
   was due, one outcome under the same id: sent, or why it was dropped (a stale
   pointer, a camera move, a newer turn). What is captured, sent and kept is
-  unchanged, and no image data or user text is logged (Kevin Rajan, Manjunath,
-  #835).
+  unchanged, and no image data or user text is logged (Kevin Rajan, @kvnloo,
+  Manjunath, @manjunath22466, #835).