ci: rollout several recent changes to CI testing

* Pass in a YAML true value as `__bootc_validation: true` using
the --extra-vars option to ensure that `__bootc_validation` is
treated as a boolean and not a string value.

`-e "__bootc_validation: true"`

You can also use JSON format:

`-e '{"__bootc_validation": true}'`

but YAML is simpler in this case.

* Use tox-lsr version 3.11.1

* Ensure the citest bad comment works when the test was cancelled in
addition to the failure case.

* Update contributing.md documentation

* Update number of nodes to use in testing farm, if needed

* remove unnecessary ansible-lint skips

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

.github/workflows/build_docs.yml

@@ -25,7 +25,7 @@ jobs:
           sudo apt install -y git
 
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Ensure the docs branch
@@ -48,12 +48,12 @@ jobs:
           fi
 
       - name: Checkout the docs branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: docs
 
       - name: Fetch README.md and .pandoc_template.html5 template from the workflow branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           sparse-checkout: |
             README.md