Pin image base to python3.11

[tsotnikov]

python3.12 has been recently release, seems that is causing trouble:

Traceback (most recent call last):
  File "/app/entrypoint.py", line 5, in <module>
    from main import Context
  File "/app/main.py", line 2, in <module>
    from j2cli.context import read_context_data
  File "/usr/local/lib/python3.12/site-packages/j2cli/__init__.py", line 10, in <module>
    from j2cli.cli import main
  File "/usr/local/lib/python3.12/site-packages/j2cli/cli.py", line 8, in <module>
    import imp, inspect
ModuleNotFoundError: No module named 'imp'

[ajeffowens]

This issue is causing failures for us, so I went ahead and created a forked version with the fix mentioned in this PR here in case anyone else needs it while we wait for a fix here. https://github.com/ajeffowens/jinja2-action

      uses: ajeffowens/[email protected]

[andre-lx]

This issue is causing failures for us, so I went ahead and created a forked version with the fix mentioned in this PR here in case anyone else needs it while we wait for a fix here. ajeffowens/jinja2-action

      uses: ajeffowens/[email protected]

You could use the forked used to create this PR with:

Telefonica/[email protected]

[2357gi]

@ajeffowens
Thank you for creating the forked version, it has been very helpful.
I would like to add a point. It is recommended to register the commit hash instead of the tag, as shown below:

        uses: ajeffowens/jinja2-action@90dab3da2215932ea86d2875224f06bbd6798617 # v2.0.0

[cuchi]

Thank you so much!