Bump aiodataloader from 0.4.2 to 0.4.3 in /demos (#1694)

Bumps [aiodataloader](https://github.com/syrusakbary/aiodataloader) from 0.4.2 to 0.4.3.
- [Release notes](https://github.com/syrusakbary/aiodataloader/releases)
- [Commits](syrusakbary/aiodataloader@v0.4.2...v0.4.3)

---
updated-dependencies:
- dependency-name: aiodataloader
  dependency-version: 0.4.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demos/graphql-demo/requirements-dev.txt

@@ -1,7 +1,7 @@
 aiohttp==3.13.2
 aiohttp-jinja2==1.6
 aiohttp-graphql==1.1.0
-aiodataloader==0.4.2
+aiodataloader==0.4.3
 faker==38.2.0
 trafaret_config==2.0.2
 graphene==2.1.9