chore(deps): update module github.com/hashicorp/go-plugin to v1.4.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/go-plugin	require	patch	v1.4.5 -> v1.4.6

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Release Notes

hashicorp/go-plugin

### [`v1.4.6`](https://togithub.com/hashicorp/go-plugin/blob/HEAD/CHANGELOG.md#v146) [Compare Source](https://togithub.com/hashicorp/go-plugin/compare/v1.4.5...v1.4.6) BUG FIXES: - server: Prevent gRPC broker goroutine leak when using `GRPCServer` type `GracefulStop()` or `Stop()` methods \[[GH-220](https://togithub.com/hashicorp/go-plugin/pull/220)]

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Configuration

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