comment out /dv/lang to prevent verbose logging

[pdurbin]

What this PR does / why we need it:

When I created this pull request:

• how to set up languages (English, French, etc.) in Docker #10940

... I didn't test it in a fresh environment where I hadn't loaded languages.zip.

In this PR, I'm commenting out /dev/lang and updating the instructions to explain that you should uncomment the /dev/lang line if you want multiple languages.

Which issue(s) this PR closes:

• Closes In containers, "No property file named Bundle_en found in /dv/lang, using untranslated values" #11043

Special notes for your reviewer:

You can preview the docs at https://dataverse-guide--11063.org.readthedocs.build/en/11063/container/running/demo.html#multiple-languages

Suggestions on how to test this:

Make sure the two compose files still work. We could retest the language setup but it should be unchanged.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No.

Is there a release notes update needed for this change?:

No, the release note in #11043 is generic enough that it's fine as-is.

Additional documentation:

See https://dataverse-guide--11063.org.readthedocs.build/en/11063/container/running/demo.html#multiple-languages

[ofahimIQSS]

No issues found during testing. Tested to ensure /dv/lang messaging no longer floods the server.log file. Was able to follow guides to set up french language on local without any issues.