chore: add issue template for release checklist

.github/ISSUE_TEMPLATE/release_checklist.md

@@ -0,0 +1,36 @@
+---
+name: Astar Release Checklist
+about: Checklist to follow before creating a new release
+title: 'Release v_xx Checklist'
+labels:
+assignees: ''
+---
+
+## Release v_xx Specific
+<!---
+All the preparation specific for this release, for example
+- [x] Test batch precompile in Astar & Shiden
+- [x] Test xtokens in Astar
+-->
+
+
+## Runtime Release
+- [ ] Check Semver bumped for below crates
+     - `astar-runtime`
+     - `shiden-runtime`
+     - `shibuya-runtime`
+     - `local-runtime`
+     - `astar-collator`
+     - `xcm-tools` (if needed)
+- [ ] Check Spec Version bumped for all runtimes
+     - Astar: x -> y
+     - Shiden: x -> y
+     - Shibuya: x -> y
+- [ ] Verify completed migrations are removed from any public networks.
+
+
+## All Releases
+- [ ]  Check and update new Github release is created with release logs.
+
+## Post Release
+- [ ] Notify Builders and DevOps

.github/PULL_REQUEST_TEMPLATE.md

@@ -5,5 +5,4 @@
 - [ ] added or updated unit tests
 - [ ] updated Astar official documentation
 - [ ] added OnRuntimeUpgrade hook for precompile revert code registration
-- [ ] updated spec version
-- [ ] updated semver
+- [ ] added benchmarks & weights for any modified runtime logics.