build(deps): update jinja2 to 3.1.6 (#1038)

Address CVE-2025-27516: Jinja2 vulnerable to sandbox breakout through
attr filter selecting format method.

See https://osv.dev/vulnerability/GHSA-cpwx-vrp4-4pq7 for details.

Signed-off-by: Claudio Matsuoka <[email protected]>

Author: cmatsuoka

docs/requirements.txt

@@ -87,7 +87,7 @@ imagesize==1.4.1
     # via
     #   -r requirements.txt
     #   sphinx
-jinja2==3.1.5
+jinja2==3.1.6
     # via
     #   -r requirements.txt
     #   myst-parser
@@ -346,4 +346,4 @@ websockets==14.1
     #   -r requirements.txt
     #   sphinx-autobuild
 wheel==0.45.1
-    # via -r requirements.txt
+    # via -r requirements.txt