Add patch changefile for multi-byte character fix

Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>

Author: Copilot

common/changes/@rushstack/node-core-library/fix-multibyte-decoding_2026-01-07-19-31.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Fix incorrect decoding of multi-byte UTF-8 characters in Executable.waitForExitAsync and getProcessInfoByIdAsync by explicitly setting stream encoding before attaching handlers",
+      "type": "patch",
+      "packageName": "@rushstack/node-core-library"
+    }
+  ],
+  "packageName": "@rushstack/node-core-library",
+  "email": "copilot@github.com"
+}