build(deps): Bump h11 from 0.14.0 to 0.16.0 in /.kokoro (#416)

Bumps [h11](https://github.com/python-hyper/h11) from 0.14.0 to 0.16.0.
- [Commits](python-hyper/h11@v0.14.0...v0.16.0)

---
updated-dependencies:
- dependency-name: h11
  dependency-version: 0.16.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

.kokoro/requirements.txt

@@ -365,9 +365,9 @@ grpcio-status==1.48.2 \
     # via
     #   -r requirements.in
     #   google-api-core
-h11==0.14.0 \
-    --hash=sha256:8f19fbbe99e72420ff35c00b27a34cb9937e902a8b810e2c88300c6f0a3b699d \
-    --hash=sha256:e3fe4ac4b851c468cc8363d500db52c2ead036020723024a109d37346efaa761
+h11==0.16.0 \
+    --hash=sha256:4e35b956cf45792e4caa5885e69fba00bdbc6ffafbfa020300e549b208ee5ff1 \
+    --hash=sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86
     # via uvicorn
 httptools==0.5.0 \
     --hash=sha256:0297822cea9f90a38df29f48e40b42ac3d48a28637368f3ec6d15eebefd182f9 \