Roll Jinja2 dependency

Fixes build issues with newer versions of Python3.

Change-Id: I04fa2e3f4dc1e6ec736dc9142554507b1844e4ae
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/68080
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: James Price <jrprice@google.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index 5298eeb..c91e858 100644
--- a/DEPS
+++ b/DEPS
@@ -90,7 +90,7 @@
 
   # Jinja2 and MarkupSafe for the code generator
   'third_party/jinja2': {
-    'url': '{chromium_git}/chromium/src/third_party/jinja2@a82a4944a7f2496639f34a89c9923be5908b80aa',
+    'url': '{chromium_git}/chromium/src/third_party/jinja2@ee69aa00ee8536f61db6a451f3858745cf587de6',
     'condition': 'dawn_standalone',
   },
   'third_party/markupsafe': {