codegen/go: Remove superfluous newline in doc.go

[Frassle]

Description

This change fixes the package documentation comment generation that was broken since #10317.

That is, Go requires package documentation comment to be strictly before the package statement without newlines in-between.

Good

// Package good has documentation comment.
package bad

Bad

// Package bad does no have a documentation comment.

package bad

Checklist

• I have added tests that prove my fix is effective or that my feature works

• I have run make changelog and committed the changelog/pending/<file> documenting my change

• Yes, there are changes in this PR that warrants bumping the Pulumi Service API version

[pulumi-bot]

Changelog

[uncommitted] (2022-11-30)

Bug Fixes

• [sdkgen/go] Fixes superfluous newline being added between documentation comment and package statement in doc.go
  #11492

[Frassle]

bors merge

[bors]

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[bors]

Build succeeded:

• bors-ok