ruby_3_1: 3.1.1 -> 3.1.2

https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-1-2-released/

Fixes: CVE-2022-28738, CVE-2022-28739

pkgs/development/interpreters/ruby/default.nix

@@ -267,7 +267,7 @@ in {
   };
 
   ruby_3_1 = generic {
-    version = rubyVersion "3" "1" "1" "";
-    sha256 = "sha256-/m5Hgt6XRDl43bqLpL440iKqJNw+PwKmqOdwHA7rYZ0=";
+    version = rubyVersion "3" "1" "2" "";
+    sha256 = "0gm84ipk6mrfw94852w5h7xxk2lqrxjbnlwb88svf0lz70933131";
   };
 }

pkgs/development/interpreters/ruby/patchsets.nix

@@ -10,6 +10,6 @@
     "${patchSet}/patches/ruby/3.0/head/railsexpress/01-improve-gc-stats.patch"
     "${patchSet}/patches/ruby/3.0/head/railsexpress/02-malloc-trim.patch"
   ];
-  "3.1.1" = ops useRailsExpress [ # no patches yet (2021-12-25)
+  "3.1.2" = ops useRailsExpress [ # no patches yet (2021-12-25)
   ];
 }