[FIX] requirements: bump up jinja2 reqs

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We normally stick as close as possible to the version we depend
on in the official DEB packages. This in turn depends on the version of
Debian stable at the time of release - for 10.0 that would be Debian 8
(jessie) and thus Jinja 2.7.3 (albeit with security backports).

However Jinja2 before 2.10.1 suffers from a few issues that could lead
to crashes of Odoo processes.

It seems it's worth an exception to our rule for pip users, similarly to
previous bump up at d2605bccdb.

closes odoo/odoo#32602

Signed-off-by: Christophe Simonis <chs@odoo.com>

requirements.txt

@@ -6,7 +6,7 @@ feedparser==5.2.1
 gevent==1.1.2
 greenlet==0.4.10
 jcconv==0.2.3
-Jinja2==2.8.1
+Jinja2==2.10.1
 lxml==3.5.0
 Mako==1.0.4
 MarkupSafe==0.23