go: Update module github.com/chrusty/protoc-gen-jsonschema to v0.4

This MR contains the following updates:

Package	Type	Update	Change
github.com/chrusty/protoc-gen-jsonschema	require	minor	v0.0.0-20240212064413-73d5723042b8 -> v0.4

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Release Notes

chrusty/protoc-gen-jsonschema (github.com/chrusty/protoc-gen-jsonschema)

v0.4: Allow null arrays and objects

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The allow_null_values option now applies to objects and arrays too.

v0.3: Parameterised options

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• "debug": enable debug logging
• "disallow_additional_properties": don't allow additional properties in JSON
• "disallow_bigints_as_strings": don't allow bigints to pass as strings

v0.2: All test cases are passing

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Tests have now been added, and all of the sample protos compile file.

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