chore: add issue template for release checklist

.github/ISSUE_TEMPLATE/release_checklist.md

@@ -0,0 +1,41 @@
+---
+name: Astar Release Checklist
+about: Checklist to follow before creating a new release
+title: 'Release v_xx Checklist'
+labels:
+assignees: ''
+---
+
+## Required Changes (PR)
+<!---
+All the PRs that should, For Example,
+- [x] #1000
+- [x] #1006 
+-->
+
+## 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
+     - Current: v_xx
+     - Last: v_xx
+- [ ] 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.
+- [ ] Verify new extrinsics have been correctly whitelisted/blacklisted for proxy filters.
+- [ ] Verify benchmarks & weights have been updated for any modified runtime logics.
+
+
+## All Releases
+- [ ]  Check and update new Github release is created with release logs.
+
+## Post Release
+- [ ] Notify Builders and DevOps