reno: Update master for unmaintained/yoga

Update the yoga release notes configuration to build from
unmaintained/yoga.

This also workaround the issue with Zed not being able to
find out where it's changes started by defining
proper regexp for `closed_branch_tag_re`

Presumably, default for reno should be adjusted to avoid this
config override, ie with [1]

[1] https://review.opendev.org/c/openstack/reno/+/910547

Change-Id: I9ff589583e7e53941c81c52e7ca5dae77c5de1d9

tox.ini

@@ -8,7 +8,7 @@ ignore_basepython_conflict = True
 usedevelop = True
 basepython = python3
 install_command =
-    pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2023.2} {opts} {packages}
+    pip install -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master} {opts} {packages}
 deps =
     -r{toxinidir}/global-requirement-pins.txt
     -r{toxinidir}/test-requirements.txt