zsh:funcs:spellcheck: Fix indentation

I forgot to reindent part of the function after moving the

    if (( $+commands[shellcheck] ))

check into the function. Before it was wrapping the function definition.

.config/zsh/zshrc.d/40-functions.zsh

@@ -530,4 +530,4 @@ shellcheck() {
 		curl -sS "$url" -X POST --data-urlencode script@"$arg" \
 		| "$json_parser"
 	done
-	}
+}