chore: update keepalive timestamp [skip ci]

actions-user · actions-user · commit c78df1977449 · 2026-01-01T00:13:49.000Z
diff --git a/.github/keepalive b/.github/keepalive
@@ -1 +1 @@
-Last keepalive: Mon Dec  1 00:13:52 UTC 2025
+Last keepalive: Thu Jan  1 00:13:49 UTC 2026
