ci: bump tox-lsr version to 3.20.0 to fix tox 4.58 api breakage [citest_skip]

This fixes the tox-lsr related test failures in ansible-lint, et. al. caused
by an internal tox api change in version 4.58

See https://github.com/linux-system-roles/tox-lsr/pull/245 for more info

Signed-off-by: Rich Megginson <rmeggins@redhat.com>

.github/workflows/ansible-test.yml

@@ -47,7 +47,7 @@ jobs:
       - name: Install tox, tox-lsr
         run: |
           set -euxo pipefail
-          pip3 install "git+https://github.com/linux-system-roles/tox-lsr@3.18.1"
+          pip3 install "git+https://github.com/linux-system-roles/tox-lsr@3.20.0"
 
       - name: Set up Python
         uses: actions/setup-python@v6