ci: do not require changelog for ci (#5058)

* Update noxfile.py

* Update pull_request_template.md

Author: trim21

.github/pull_request_template.md

@@ -5,6 +5,7 @@ By submitting these contributions you agree for them to be dual-licensed under P
 Please consider adding the following to your pull request:
  - an entry for this PR in newsfragments - see [https://pyo3.rs/main/contributing.html#documenting-changes]
    - or start the PR title with `docs:` if this is a docs-only change to skip the check
+   - or start the PR title with `ci:` if this is a ci-only change to skip the check
  - docs to all new functions and / or detail in the guide
  - tests for all new or changed functions
 

noxfile.py

@@ -573,6 +573,7 @@ def address_sanitizer(session: nox.Session):
 _IGNORE_CHANGELOG_PR_CATEGORIES = (
     "release",
     "docs",
+    "ci",
 )