build(deps): bump sphinxcontrib-qthelp in /mobile/docs

Bumps [sphinxcontrib-qthelp](https://github.com/sphinx-doc/sphinxcontrib-qthelp) from 1.0.3 to 2.0.0.
- [Release notes](https://github.com/sphinx-doc/sphinxcontrib-qthelp/releases)
- [Changelog](https://github.com/sphinx-doc/sphinxcontrib-qthelp/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinxcontrib-qthelp@1.0.3...2.0.0)

---
updated-dependencies:
- dependency-name: sphinxcontrib-qthelp
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

mobile/docs/requirements.txt

@@ -191,9 +191,9 @@ sphinxcontrib-googleanalytics==0.4 \
 sphinxcontrib-jsmath==1.0.1 \
     --hash=sha256:2ec2eaebfb78f3f2078e73666b1415417a116cc848b72e5172e596c871103178 \
     --hash=sha256:a9925e4a4587247ed2191a22df5f6970656cb8ca2bd6284309578f2153e0c4b8
-sphinxcontrib-qthelp==1.0.3 \
-    --hash=sha256:bd9fc24bcb748a8d51fd4ecaade681350aa63009a347a8c14e637895444dfab6 \
-    --hash=sha256:4c33767ee058b70dba89a6fc5c1892c0d57a54be67ddd3e7875a18d14cba5a72
+sphinxcontrib-qthelp==2.0.0 \
+    --hash=sha256:4fe7d0ac8fc171045be623aba3e2a8f613f8682731f9153bb2e40ece16b9bbab \
+    --hash=sha256:b18a828cdba941ccd6ee8445dbe72ffa3ef8cbe7505d8cd1fa0d42d3f2d5f3eb
 sphinxcontrib-serializinghtml==1.1.5 \
     --hash=sha256:352a9a00ae864471d3a7ead8d7d79f5fc0b57e8b3f95e9867eb9eb28999b92fd \
     --hash=sha256:aa5f6de5dfdf809ef505c4895e51ef5c9eac17d0f287933eb49ec495280b6952