Hola tengo un problema con #footer y id

Cuéntanos qué está pasando:
Describe tu problema en detalle aquí.

  **Tu código hasta el momento**

<h2>CatPhotoApp</h2>
<main>

<a href  ="https://www.freecatphotoapp.com" alt="cat photos " </a>

<img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back.">

<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff. Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched. Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
<p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched. Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff. Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>
<p>Meowwww loved it, hated it, loved it, hated it yet spill litter box, scratch at owner, destroy all furniture, especially couch or lay on arms while you're using the keyboard. Missing until dinner time toy mouse squeak roll over. With tail in the air lounge in doorway. Man running from cops stops to pet cats, goes to jail.</p>
<p>Intently stare at the same spot poop in the plant pot but kitten is playing with dead mouse. Get video posted to internet for chasing red dot leave fur on owners clothes meow to be let out and mesmerizing birds leave fur on owners clothes or favor packaging over toy so purr for no reason. Meow to be let out play time intently sniff hand run outside as soon as door open yet destroy couch.</p>

</main>

<h2 id>Copyright jump to bottom</h2>
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El agente de usuario es: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36

Desafío: Enlaza hacia secciones internas de una página con los elementos anchor

Enlaza al desafío:

Tomando el código del reto como ejemplo
href tiene la URL a donde iremos al dar click en el link, en este caso es un link externo

 <a href="https://www.freecatphotoapp.com" target="_blank">cat photos</a>

Tambien es posible que href tenga el valor del id de un elmento dentro de la pagina

Este es mi link añadiendo el simbolo # y el nombre del id a donde quiero ir
<a href="#parrafo">Este link me lleva al parrafo</a>
...
...
Este es elemento cualquiera , puede ser un footer o un h2  
yo usare un elemento p
<p id="parrafo">Soy un parrafo</p>

Ahora cuando de click en el link “Este link me lleva al parrafo” , el link me llevara al elemento parrafo con el id parrafo


Respecto a tu codigo:
si eliminate target="_blank", esto esta bien
pero no cambiaste el valor del href por el id del footer

<a href  ="https://www.freecatphotoapp.com" alt="cat photos " </a>

No tienes que cambiar el footer por un h2 y te falto darle valor al id

<h2 id>Copyright jump to bottom</h2>