Bump pyspark from 3.0.1 to 3.1.3 in /cluster/sdk/python

Bumps [pyspark](https://github.com/apache/spark) from 3.0.1 to 3.1.3.
- [Release notes](https://github.com/apache/spark/releases)
- [Commits](https://github.com/apache/spark/compare/v3.0.1...v3.1.3)

---
updated-dependencies:
- dependency-name: pyspark
  dependency-type: direct:production
...

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

cluster/sdk/python/requirements-ci.txt

@@ -4,7 +4,7 @@ flake8
 black==19.10b0
 isort>=5
 grpcio-tools==1.31.0
-pyspark==3.0.1
+pyspark==3.1.3
 pandas~=1.0.0
 mock==2.0.0
 pandavro==1.5.*

cluster/sdk/python/setup.py

@@ -140,7 +140,7 @@ setup(
     # Install dev requirements with: pip install -e .[dev]
     extras_require={
         "dev": ["mypy-protobuf==1.*", "grpcio-testing==1.*"],
-        "validation": ["great_expectations==0.13.2", "pyspark==3.0.1"],
+        "validation": ["great_expectations==0.13.2", "pyspark==3.1.3"],
     },
     include_package_data=True,
     license="Apache",