Merge pull request #128163 from nh2/github-actions-backport-link-to-criteria

Make backport bot link to criteria, make `CONTRIBUTING.md` more prominent

.github/PULL_REQUEST_TEMPLATE.md

···
 - [ ] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
 - [ ] Tested compilation of all pkgs that depend on this change using `nix-shell -p nixpkgs-review --run "nixpkgs-review wip"`
 - [ ] Tested execution of all binary files (usually in `./result/bin/`)
-- [21.11 Release Notes (or backporting 21.05 Relase notes)](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md#generating-2111-release-notes)
+- [21.11 Release Notes (or backporting 21.05 Relase notes)](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#generating-2111-release-notes)
   - [ ] (Package updates) Added a release notes entry if the change is major or breaking
   - [ ] (Module updates) Added a release notes entry if the change is significant
   - [ ] (Module addition) Added a release notes entry if adding a new NixOS module
-- [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).
+- [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).

.github/workflows/backport.yml

···
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Create backport PRs
         # should be kept in sync with `version`
-        uses: zeebe-io/backport-action@9b8949dcd4295d364b0939f07d0c7593598d26cd
+        uses: zeebe-io/backport-action@2b994724142df0774855690db56bc6308fb99ffa
         with:
+          # Config README: https://github.com/zeebe-io/backport-action#backport-action
           github_token: ${{ secrets.GITHUB_TOKEN }}
           github_workspace: ${{ github.workspace }}
           # should be kept in sync with `uses`
-          version: 9b8949dcd4295d364b0939f07d0c7593598d26cd
+          version: 2b994724142df0774855690db56bc6308fb99ffa
+          pull_description: |-
+            Bot-based backport to `${target_branch}`, triggered by a label in #${pull_number}.
+
+            * [ ] Before merging, ensure that this backport complies with the [Criteria for Backporting](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#criteria-for-backporting-changes).
+              * Even as a non-commiter, if you find that it does not comply, leave a comment.

README.md

···
   deemed of sufficiently high quality
 
 For more information about contributing to the project, please visit
-the [contributing page](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).
+the [contributing page](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).
 
 # Donations
 

doc/contributing/submitting-changes.chapter.md

···
 
 - Push your changes to your fork of nixpkgs.
 - Create the pull request
-- Follow [the contribution guidelines](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md#submitting-changes).
+- Follow [the contribution guidelines](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#submitting-changes).
 
 ## Submitting security fixes {#submitting-changes-submitting-security-fixes}
 
···
 
 ### Meets Nixpkgs contribution standards {#submitting-changes-contribution-standards}
 
-The last checkbox is fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md). The contributing document has detailed information on standards the Nix community has for commit messages, reviews, licensing of contributions you make to the project, etc\... Everyone should read and understand the standards the community has for contributing before submitting a pull request.
+The last checkbox is fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md). The contributing document has detailed information on standards the Nix community has for commit messages, reviews, licensing of contributions you make to the project, etc\... Everyone should read and understand the standards the community has for contributing before submitting a pull request.
 
 ## Hotfixing pull requests {#submitting-changes-hotfixing-pull-requests}