Bump Google.Protobuf from 3.15.8 to 3.16.0 (#4999)

Bumps [Google.Protobuf](https://github.com/protocolbuffers/protobuf) from 3.15.8 to 3.16.0.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/master/generate_changelog.py)
- [Commits](protocolbuffers/protobuf@v3.15.8...v3.16.0)

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

src/common.props

@@ -14,7 +14,7 @@
     <HyperionVersion>0.10.1</HyperionVersion>
     <NewtonsoftJsonVersion>13.0.1</NewtonsoftJsonVersion>
     <NBenchVersion>2.0.1</NBenchVersion>
-    <ProtobufVersion>3.15.8</ProtobufVersion>
+    <ProtobufVersion>3.16.0</ProtobufVersion>
     <NetCoreTestVersion>netcoreapp3.1</NetCoreTestVersion>
     <NetTestVersion>net5.0</NetTestVersion>
     <NetFrameworkTestVersion>net471</NetFrameworkTestVersion>