Update protobuf requirement from <4,>3.6.1 to >3.6.1,<6

[dependabot[bot]]

Updates the requirements on protobuf to permit the latest version.

Commits

• 63def39 Updating version.json and repo version numbers to: 27.2
• 19bd211 Port windows bootstrapping fix (#17225)
• 4923b8d Fix string_type bugs in edition 2023 (#17211)
• b0a3c23 Merge pull request #17164 from protocolbuffers/cp-stubs
• 270ca66 Cleanup imports and comments in V3 stubs.
• 1e360a4 Add stubs for GeneratedMessageV3, RepeatedFieldBuilderV3, SingleFieldBuilderV...
• 9cfb59b Add simple conformance test that builds the old gencode against the current r...
• 6c6f514 Merge pull request #17161 from protocolbuffers/backport-java
• c7a006a Fix checking unknown field set empty which wasn't exposed yet in 27.x
• 2426a02 Reserialize all unresolved features using java features from the generated po...
• Additional commits viewable in compare view

Most Recent Ignore Conditions Applied to This Pull Request

Dependency Name	Ignore Conditions
protobuf	[>= 4.a, < 5]

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