Update default gems list at bf33085340 [ci skip]

2023-11-07 03:43:55 +00:00 · 2023-11-07 03:43:55 +00:00 · 7832a52ce7
--- a/NEWS.md
+++ b/NEWS.md
@ -126,6 +126,7 @@ The following default gems are updated.
 * mutex_m 0.2.0
 * net-http 0.4.0
 * nkf 0.1.3
+* observer 0.1.2
 * open3 0.2.0
 * openssl 3.2.0
 * optparse 0.4.0