Bump protobuf from 3.6.1 to 3.18.3 in /scripts/GoogleCloud/BQ

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 3.6.1 to 3.18.3.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/generate_changelog.py)
- [Commits](protocolbuffers/protobuf@v3.6.1...v3.18.3)

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

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

Author: dependabot[bot]

scripts/GoogleCloud/BQ/requirements.txt

@@ -14,7 +14,7 @@ numpy==1.16.1
 oauthlib==3.0.1
 pandas==0.24.0
 pandas-gbq==0.9.0
-protobuf==3.6.1
+protobuf==3.18.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.4
 pydata-google-auth==0.1.1