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

Bumps [sphinxcontrib-htmlhelp](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp) from 2.0.1 to 2.0.4.
- [Release notes](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/releases)
- [Changelog](https://github.com/sphinx-doc/sphinxcontrib-htmlhelp/blob/2.0.4/CHANGES)
- [Commits](sphinx-doc/sphinxcontrib-htmlhelp@2.0.1...2.0.4)

---
updated-dependencies:
- dependency-name: sphinxcontrib-htmlhelp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

mobile/docs/requirements.txt

@@ -179,9 +179,9 @@ sphinxcontrib-applehelp==1.0.4 \
 sphinxcontrib-devhelp==1.0.2 \
     --hash=sha256:8165223f9a335cc1af7ffe1ed31d2871f325254c0423bc0c4c7cd1c1e4734a2e \
     --hash=sha256:ff7f1afa7b9642e7060379360a67e9c41e8f3121f2ce9164266f61b9f4b338e4
-sphinxcontrib-htmlhelp==2.0.1 \
-    --hash=sha256:0cbdd302815330058422b98a113195c9249825d681e18f11e8b1f78a2f11efff \
-    --hash=sha256:c38cb46dccf316c79de6e5515e1770414b797162b23cd3d06e67020e1d2a6903
+sphinxcontrib-htmlhelp==2.0.4 \
+    --hash=sha256:6c26a118a05b76000738429b724a0568dbde5b72391a688577da08f11891092a \
+    --hash=sha256:8001661c077a73c29beaf4a79968d0726103c5605e27db92b9ebed8bab1359e9
 sphinxcontrib-httpdomain==1.8.1 \
     --hash=sha256:21eefe1270e4d9de8d717cc89ee92cc4871b8736774393bafc5e38a6bb77b1d5 \
     --hash=sha256:6c2dfe6ca282d75f66df333869bb0ce7331c01b475db6809ff9d107b7cdfe04b