Add github PR template for new release workflow checklist

Signed-off-by: lelia <lelia@socket.dev>

Author: lelia

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,26 @@
+## Summary
+
+<!-- What does this PR do? Why? -->
+
+## Changes
+
+<!-- Bullet points are fine. Link to relevant issues/tickets if applicable. -->
+
+## Testing
+
+<!-- How was this tested? Local smoke test, CI, manual verification, etc. -->
+
+---
+
+### Release checklist (skip for non-release PRs)
+
+<!-- Only fill this out if this PR is cutting a new release (e.g. v2.1.0). -->
+
+- [ ] `socket_basics/version.py` updated to new version
+- [ ] `pyproject.toml` updated to match
+- [ ] `action.yml` `image:` ref updated to `docker://ghcr.io/socketdev/socket-basics:<new-version>`
+- [ ] `CHANGELOG.md` `[Unreleased]` section reviewed and accurate
+
+> ⚠️ **After merging:** run `publish-docker.yml` via `workflow_dispatch` with the new version
+> **before** creating the git tag. The image must exist in GHCR before the tag is pushed.
+> See [Release workflow](../docs/github-action.md#release-workflow-publish--tag-never-tag--publish) for the full process.

.gitignore

@@ -89,6 +89,7 @@ logs/
 !CHANGELOG.md
 !docs/*.md
 !tests/README.md
+!.github/PULL_REQUEST_TEMPLATE.md
 
 # Project-specific (local scripts and test files)
 test/