docs: fix links

Author: suzuki-shunsuke

.github/pull_request_template.md

@@ -2,11 +2,11 @@
 
 <!-- Please check the list. Please don't remove the check list. -->
 
-- [ ] Read [CONTRIBUTING.md](https://github.com/aquaproj/aqua/blob/main/CONTRIBUTING.md)
+- [ ] Read [CONTRIBUTING.md](https://github.com/aquaproj/devcontainer-features/blob/main/CONTRIBUTING.md)
   - [ ] Read [OSS Contribution Guide](https://github.com/suzuki-shunsuke/oss-contribution-guide/blob/main/README.md)
 - [ ] [Write a GitHub Issue before creating a Pull Request](https://github.com/suzuki-shunsuke/oss-contribution-guide/blob/main/README.md#create-an-issue-before-creating-a-pull-request)
   - Link to the issue:
-- [ ] [All commits are signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits)
+- [ ] [All commits are signed](https://github.com/suzuki-shunsuke/oss-contribution-guide/blob/main/docs/commit-signing.md)
   - This repository enables `Require signed commits`, so all commits must be signed
 - [ ] [Avoid force push](https://github.com/suzuki-shunsuke/oss-contribution-guide?tab=readme-ov-file#dont-do-force-pushes-after-opening-pull-requests)
 - [ ] Do only one thing in one Pull Request