Update PULL_REQUEST_TEMPLATE.md

Author: TimotheeMathieu

.github/PULL_REQUEST_TEMPLATE.md

@@ -11,10 +11,11 @@ List any dependencies that are required for this change.
 - \[ ] My code follows the style guideline
 To check :
    black --check examples rlberry *py
-   flake8 --select F401,F405,D410,D411,D412 --exclude=rlberry/check_packages.py --per-file-ignores="__init__.py:F401"
-- \[ ] I have commented my code, particularly in hard-to-understand areas
-- \[ ] I have made corresponding changes to the documentation
-- \[ ] I have added tests that prove my fix is effective or that my feature works
-- \[ ] New and existing unit tests pass locally with my changes
-- \[ ] I have set the label "ready for review" and the checks are all green
+   flake8 --select F401,F405,D410,D411,D412 --exclude=rlberry/check_packages.py --per-file-ignores="__init__.py:F401",
+- \[ ] I have commented my code, particularly in hard-to-understand areas,
+- \[ ] I have made corresponding changes to the documentation,
+- \[ ] I have added tests that prove my fix is effective or that my feature works,
+- \[ ] New and existing unit tests pass locally with my changes,
+- \[ ] If updated the changelog if necessary,
+- \[ ] I have set the label "ready for review" and the checks are all green.
 -->