Lock Python patch versions to 3.11.8 and 3.12.2

Changes to argparse in Python 3.11.9 and 3.12.3 (as well as 3.13.0a5)
causes problems for argcomplete. This causes the Bygg completion
functionality to not work and the relevant tests to fail.

For now, lock the Python versions to 3.11.8 and 3.12.2 in the code
quality workflow, for Nox and in .tool-versions.

Workaround for #138.

.github/workflows/code_quality.yml

@@ -10,7 +10,7 @@ jobs:
   nox:
     strategy:
       matrix:
-        python_version: ["3.11", "3.12"]
+        python_version: ["3.11.8", "3.12.2"]
         nox_session: [tests, basics, examples]
         os: [ubuntu-latest, macos-latest, macos-14]
         install_uv: [0, 1]
@@ -36,7 +36,7 @@ jobs:
   pyright_and_ruff:
     strategy:
       matrix:
-        python_version: ["3.11", "3.12"]
+        python_version: ["3.11.8", "3.12.2"]
     runs-on: "ubuntu-latest"
     steps:
       - uses: actions/checkout@v4

.tool-versions

@@ -1 +1 @@
-python 3.12 3.11
+python 3.12.2 3.11.8

noxfile.py

@@ -3,7 +3,7 @@
 nox.options.error_on_external_run = True
 nox.options.stop_on_first_error
 
-python_versions = ["3.11", "3.12"]
+python_versions = ["3.11.8", "3.12.2"]
 
 
 @nox.session(python=python_versions)