Bump setuptools from 43.0.0 to 46.0.0 in /docker/build_scripts

Bumps [setuptools](https://github.com/pypa/setuptools) from 43.0.0 to 46.0.0.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/master/CHANGES.rst)
- [Commits](pypa/setuptools@v43.0.0...v46.0.0)

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

Author: dependabot-preview[bot]

docker/build_scripts/requirements.txt

@@ -6,6 +6,6 @@ pip==20.0.2 \
 wheel==0.31.1 \
     --hash=sha256:80044e51ec5bbf6c894ba0bc48d26a8c20a9ba629f4ca19ea26ecfcf87685f5f \
     --hash=sha256:0a2e54558a0628f2145d2fc822137e322412115173e8a2ddbe1c9024338ae83c
-setuptools==43.0.0 \
-    --hash=sha256:a67faa51519ef28cd8261aff0e221b6e4c370f8fb8bada8aa3e7ad8945199963 \
-    --hash=sha256:db45ebb4a4b3b95ff0aca3ce5fe1e820ce17be393caf8902c78aa36240e8c378
+setuptools==46.0.0 \
+    --hash=sha256:693e0504490ed8420522bf6bc3aa4b0da6a9f1c80c68acfb4e959275fd04cd82 \
+    --hash=sha256:2f00f25b780fbfd0787e46891dcccd805b08d007621f24629025f48afef444b5