package/ruby: security bump to version 3.1.2

Fixes the following security issues:

- CVE-2022-28738: Double free in Regexp compilation
- CVE-2022-28739: Buffer overrun in String-to-Float conversion

For more details, see the announcement:
https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-1-2-released/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Tested-By: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ruby/ruby.hash

@@ -1,5 +1,6 @@
-# https://www.ruby-lang.org/en/news/2021/12/25/ruby-3-1-0-released/
-sha512  a2bb6b5e62d5fa06dd9c30cf84ddcb2c27cb87fbaaffd2309a44391a6b110e1dde6b7b0d8c659b56387ee3c9b4264003f3532d5a374123a7c187ebba9293f320  ruby-3.1.0.tar.xz
+# https://www.ruby-lang.org/en/news/2022/04/12/ruby-3-1-2-released/
+sha512  4a74e9efc6ea4b3eff4fec7534eb1fff4794d021531defc2e9937e53c6668db8ecdc0fff2bc23d5e6602d0df344a2caa85b31c5414309541e3d5313ec82b6e21  ruby-3.1.2.tar.xz
+
 # License files, Locally calculated
 sha256  794c384f94396ab07e3e6f53a9f8be093facb7eb4193266024302b93b29e12dc  LEGAL
 sha256  967586d538a28955ec2541910cf63c5ac345fcdea94bfb1f1705a1f6eb36bcbb  COPYING

package/ruby/ruby.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 RUBY_VERSION_MAJOR = 3.1
-RUBY_VERSION = $(RUBY_VERSION_MAJOR).0
+RUBY_VERSION = $(RUBY_VERSION_MAJOR).2
 RUBY_VERSION_EXT = 3.1.0
 RUBY_SITE = http://cache.ruby-lang.org/pub/ruby/$(RUBY_VERSION_MAJOR)
 RUBY_SOURCE = ruby-$(RUBY_VERSION).tar.xz