[Chore] add tag PR template (#262)

Add PR template for chore/tag PR.

.github/PULL_REQUEST_TEMPLATE.md

@@ -5,7 +5,8 @@ This is the main entry for selecting a template for your PR.
 - [Feature](?expand=1&template=feature.md)
 - [Fix](?expand=1&template=fix.md)
 - [Refinement](?expand=1&template=refinement.md)
+- [Chore/tag](?expand=1&template=tag.md)
 
 If PR type is not in the above list, feel free to start from blank PR body.
 
-** DON'T INCLUDE THIS PAGE'S CONTENTS IN YOUR PR BODY. **
+** DON'T INCLUDE THIS PAGE'S CONTENTS IN YOUR PR BODY. **

.github/PULL_REQUEST_TEMPLATE/tag.md

@@ -0,0 +1,28 @@
+## Description
+
+## Commits since <last_tag_version>
+
+<!-- Insert the comparing URL here.
+
+For example:
+
+[`tag/v3.6.0...cf54361`](https://github.com/tier4/ota-client/compare/v3.6.0...cf54361)
+
+-->
+
+### Bug fix
+
+<!-- List of bug fix PRs if any. -->
+
+
+### Refinement
+
+<!-- List of refinement PRs if any. -->
+
+### Chore
+
+<!-- List of chore PRs if any. -->
+
+### Deps
+
+<!-- List of deps PRs. -->