Update bundled_gems at 2021-12-14

gems/bundled_gems

@@ -11,6 +11,6 @@ net-pop 0.1.1 https://github.com/ruby/net-pop
 net-smtp 0.3.1 https://github.com/ruby/net-smtp
 matrix 0.4.2 https://github.com/ruby/matrix
 prime 0.1.2 https://github.com/ruby/prime
-rbs 1.8.0 https://github.com/ruby/rbs
+rbs 1.8.1 https://github.com/ruby/rbs
 typeprof 0.20.4 https://github.com/ruby/typeprof
 debug 1.3.4 https://github.com/ruby/debug 1e1bc8262fcbd33199114b7573151c7754a3e505