package/ruby: security bump to version 2.7.3

This release includes security fixes:
- CVE-2021-28965: XML round-trip vulnerability in REXML
- CVE-2021-28966: Path traversal in Tempfile on Windows

https://www.ruby-lang.org/en/news/2021/04/05/ruby-2-7-3-released/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ruby/ruby.hash

@@ -1,5 +1,5 @@
-# https://www.ruby-lang.org/en/news/2020/10/02/ruby-2-7-2-released/
-sha256  1b95ab193cc8f5b5e59d2686cb3d5dcf1ddf2a86cb6950e0b4bdaae5040ec0d6  ruby-2.7.2.tar.xz
+# https://www.ruby-lang.org/en/news/2021/04/05/ruby-2-7-3-released/
+sha256  5e91d1650857d43cd6852e05ac54683351e9c301811ee0bef43a67c4605e7db1  ruby-2.7.3.tar.xz
 # License files, Locally calculated
 sha256  b09ca195d2de08f0aacfa8793d0af62d7681c304b3ef714b75813721823295a6  LEGAL
 sha256  967586d538a28955ec2541910cf63c5ac345fcdea94bfb1f1705a1f6eb36bcbb  COPYING

package/ruby/ruby.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 RUBY_VERSION_MAJOR = 2.7
-RUBY_VERSION = $(RUBY_VERSION_MAJOR).2
+RUBY_VERSION = $(RUBY_VERSION_MAJOR).3
 RUBY_VERSION_EXT = 2.7.0
 RUBY_SITE = http://cache.ruby-lang.org/pub/ruby/$(RUBY_VERSION_MAJOR)
 RUBY_SOURCE = ruby-$(RUBY_VERSION).tar.xz