refactor(changelog): change version flag shorthand to uppercase V

Update the shorthand from "v" to "V" in the changelog command and adjust the corresponding test assertion.

cmd/changelog.go

@@ -21,7 +21,7 @@ var changelogCmd = &cobra.Command{
 
 func init() {
 	changelogCmd.Flags().String("since", "", "Start from this tag/ref (default: previous tag)")
-	changelogCmd.Flags().StringP("version", "v", "", "Override version for header (default: latest git tag)")
+	changelogCmd.Flags().StringP("version", "V", "", "Override version for header (default: latest git tag)")
 	changelogCmd.Flags().Bool("stdout", false, "Print ONLY the new section (ideal for Gitea release notes)")
 	changelogCmd.Flags().Bool("commit", false, "After writing, remind to run grokkit commit")
 	rootCmd.AddCommand(changelogCmd)

cmd/changelog_test.go

@@ -95,7 +95,7 @@ func TestChangelogCmd_Flags(t *testing.T) {
 
 	versionFlag := changelogCmd.Flags().Lookup("version")
 	require.NotNil(t, versionFlag)
-	assert.Equal(t, "v", versionFlag.Shorthand)
+	assert.Equal(t, "V", versionFlag.Shorthand)
 
 	commitFlag := changelogCmd.Flags().Lookup("commit")
 	require.NotNil(t, commitFlag)