Merge pull request #53 from buildkite/keithduncan/add-release-instructions

Add RELEASE.md instructions

Author: keithduncan

RELEASE.md

@@ -0,0 +1,6 @@
+# Releasing
+
+1. Decide what the version will be. Use a GitHub compare from the most recent release to the HEAD of the default branch e.g. https://github.com/buildkite/elastic-ci-stack-s3-secrets-hooks/compare/v2.1.4...master
+1. Find the most recent default branch build in the Buildkite pipeline
+1. Unblock the block step supplying the version number that the tag will use, e.g. v2.1.5
+1. Wait for the GitHub Release publish step to run