feat: migrate changelog path to CHANGELOG.md

internal/vociferate/vociferate.go

@@ -19,7 +19,7 @@ import (
 const (
 	defaultVersionFile        = "release-version"
 	defaultVersionExpr        = `^\s*([^\r\n]+)\s*$`
-	defaultChangelog          = "changelog.md"
+	defaultChangelog          = "CHANGELOG.md"
 	defaultUnreleasedTemplate = "### Breaking\n\n### Added\n\n### Changed\n\n### Removed\n\n### Fixed\n"
 )
 
@@ -38,7 +38,7 @@ type Options struct {
 	// When empty, a line-oriented default matcher is used.
 	VersionPattern string
 	// Changelog is the path to the changelog file, relative to the repository
-	// root. When empty, changelog.md is used.
+	// root. When empty, CHANGELOG.md is used.
 	Changelog string
 }