Create RELEASES.md

Author: MSP-Greg

RELEASES.md

@@ -0,0 +1,9 @@
+# @MSP-Greg/setup-ruby-pkgs Releases
+
+### v1.7.0
+- [Add this document]
+- [Fix version info, update @actions/core to 1.2.4, OpenSSL again](https://github.com/MSP-Greg/setup-ruby-pkgs/commit/376d8eb)
+
+### v1.6.0
+
+- [msys2-2020-05-01, add version info](https://github.com/MSP-Greg/setup-ruby-pkgs/commit/03698dc)