Update tests/constraints.in

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/constraints.in

@@ -7,6 +7,6 @@ antsibull-docs == 2.16.2  # currently approved version
 
 sphinx-rtd-theme >= 2.0.0  # Fix 404 pages with new sphinx -- https://github.com/ansible/ansible-documentation/issues/678
 rstcheck < 6  # rstcheck 6.x has problem with rstcheck.core triggered by include files w/ sphinx directives https://github.com/rstcheck/rstcheck-core/issues/3
-jinja2 >= 3.0.0
-pyyaml >= 5.1
-resolvelib >= 0.5.3, < 1.1.0
+jinja2 >= 3.0.0  # https://github.com/ansible/ansible/blob/devel/requirements.txt
+pyyaml >= 5.1  # https://github.com/ansible/ansible/blob/devel/requirements.txt
+resolvelib >= 0.5.3, < 1.1.0  # https://github.com/ansible/ansible/blob/devel/requirements.txt