Prepare 1.18.0 release (#438)

Signed-off-by: Appu Goundan <[email protected]>

Author: loosebazooka

Makefile

@@ -14,7 +14,7 @@
 
 # Bump these on release
 VERSION_MAJOR ?= 1
-VERSION_MINOR ?= 17
+VERSION_MINOR ?= 18
 VERSION_BUILD ?= 0
 
 VERSION ?= v$(VERSION_MAJOR).$(VERSION_MINOR).$(VERSION_BUILD)

RELEASING.md

@@ -4,5 +4,6 @@ Barebones releasing instructions
 
 - Update Makefile `VERSION_xxx` and submit changes
 - Tag the new release (at the above commit)
-- Tagging triggers a build on cloud build
-- Go update the release on github with artifacts (from gcs) and release notes
+- Tagging triggers a goreleaser build on github actions
+- Artifacts are automatically added to the github release 
+- Container images are published to ghcr.io/GoogleContainerTools/container-structure-test (:latest, :<version>)