Fix grammar (#28)

Author: tangrufus

README.md

@@ -138,7 +138,7 @@ Read more at https://docs.brew.sh/Shell-Completion
 > **Hire Tang Rufus!**
 >
 > I am looking for my next role, freelance or full-time.
-> If you find this tool useful, I can build you more weird stuffs like this.
+> If you find this tool useful, I can build you more weird stuff like this.
 > Let's talk if you are hiring PHP / Ruby / Go developers.
 >
 > Contact me at https://typist.tech/contact/

src/Application.php

@@ -111,7 +111,7 @@ public function getLongVersion(): string
             ->formatBlock(
                 [
                     'I am looking for my next role, freelance or full-time.',
-                    'If you find this tool useful, I can build you more weird stuffs like this.',
+                    'If you find this tool useful, I can build you more weird stuff like this.',
                     "Let's talk if you are hiring PHP / Ruby / Go developers.",
                 ],
                 'error',