fix(build): trigger release only when tagged (#20)

Release workflow was getting triggered when new branch
was created. This commit updates the condition on the
release workflow to get triggered only when a new release
tag is created.

Signed-off-by: kmova <kiran.mova@mayadata.io>

.github/workflows/release.yml

@@ -14,9 +14,9 @@
 name: release
 
 on:
-  create:
-    tags:
-      - 'v*'
+  release:
+    types:
+      - 'created'
 
 jobs:
   linux-utils:

README.md

@@ -1,3 +1,8 @@
 # linux-utils
 
 This repository contains the scripts required for building a customized alpine based linux utils docker image used for launching OpenEBS helper jobs. 
+This repository also acts as a trigger to initiate the release workflow. For example: 
+- Creating a release tag from `main` branch with a release tag like v3.m.n, will result in tagging the downstream repos with the tag v3.m.n on branch v3.m.x
+- Creating a release tag from `v2.12.x` branch with a release tag like v2.12.1, will result in tagging the downstream repos with tag v2.12.1 on branches v2.12.x
+
+For more information on the release process, see https://github.com/openebs/openebs/blob/HEAD/RELEASE.md