requirements.txt: Add requirements file to pin jinja2 version

To workaround a known issue with mkdocs:
https://linaro.atlassian.net/browse/TFC-306
https://github.com/readthedocs/readthedocs.org/issues/9064

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I9707e4ab692b3357d68c6bcbf3f2f626378dc701
1 file changed
tree: d956ef9348ead641ecdc30fab67ad7e42b772484
  1. docs/
  2. .gitreview
  3. mkdocs.yml
  4. requirements.txt