build(deps): bump tendril from 0.4.2 to 0.4.3 in /examples/html-py-ever

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

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

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

Author: dependabot[bot]

examples/html-py-ever/Cargo.lock

@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 kuchiki = "0.8.0"
 pyo3 = { version = "0.16.2", features = ["extension-module"] }
-tendril = "0.4.2"
+tendril = "0.4.3"
 
 [lib]
 name = "html_py_ever"