add changelog file to the repo and update pr template (#3946)

* add changelog file to the repo and update pr template

* update codeowner for changelog file

* Update PULL_REQUEST_TEMPLATE.md

* Update CHANGELOG.md

Co-authored-by: Tirumarai Selvan <tirumarai.selvan@gmail.com>

.github/CODEOWNERS

@@ -1,4 +1,5 @@
-/server/    @lexi-lambda
-/docs/      @marionschleifer
-/cli/       @shahidhk
-/console/   @beerose
+/server/     @lexi-lambda
+/docs/       @marionschleifer
+/cli/        @shahidhk
+/console/    @beerose
+CHANGELOG.md @marionschleifer,@shahidhk

.github/PULL_REQUEST_TEMPLATE.md

@@ -5,6 +5,10 @@
 <!-- The title might not be enough to convey how this change affects the user. -->
 <!-- Describe the changes from a user's perspective -->
 
+### Changelog
+
+- [ ] `CHANGELOG.md` is updated with user-facing content relevant to this PR.
+
 ### Affected components
 <!-- Remove non-affected components from the list -->
 

CHANGELOG.md

@@ -0,0 +1,6 @@
+# Hasura GraphQL Engine Changelog
+
+## `v1.2.0-beta.1`
+
+- Introducing Actions: https://docs.hasura.io/1.0/graphql/manual/actions/index.html
+- Downgrade command: https://hasura.io/docs/1.0/graphql/manual/deployment/downgrading.html#downgrading-hasura-graphql-engine