docs: Use python3 for building docs

python2 is EOL.

Signed-off-by: Thomas Bechtold <tbechtold@suse.com>

diff --git a/tox.ini b/tox.ini
index 9e899a668326a4a713f2ae16a752e2c6fea311a5..11449d79216020e89bef9b0ad67bad796b2978cc 100644 (file)
--- a/tox.ini
+++ b/tox.ini
@@ -60,11 +60,11 @@ deps=
 commands=flake8 --select=F,E9 {posargs:teuthology scripts}
 
 [testenv:docs]
+basepython=python3
 install_command = pip install --upgrade {opts} {packages}
-basepython=python
 changedir=docs
 deps=
-  -r{toxinidir}/requirements2.txt
+  -r{toxinidir}/requirements3.txt
   sphinx
   mock==2.0.0
 commands=