New dependency "python3-venv" not documentented

[RobertFlatt]

Checklist

• [x ] the issue is indeed a bug and not a support request
• [x ] issue doesn't already exist: https://github.com/kivy/python-for-android/issues
• I have a short, runnable example that reproduces the issue
• I reproduced the problem with the latest development version (p4a.branch = develop)
• I used the grave accent (aka backticks) to format code or logs when appropriated

Versions

• Python:
• OS:
• Kivy:
• Cython:
• OpenJDK:

Description

p4a==master now depends on python3-venv
This dependency is missing from the Buildozer install documentation

https://buildozer.readthedocs.io/en/latest/installation.html#targeting-android

buildozer.spec

Command:

// REPLACE ME: buildozer command ran? e.g. buildozer android debug
// Keep the triple grave accent (aka backquote/backtick) to have the code formatted

Spec file:

// REPLACE ME: Paste your buildozer.spec file here

Logs

// REPLACE ME: Paste the build output containing the error
// Keep the triple grave accent (a.k.a. backquote/backtick) to have the code formatted