Typo error on CSS tutorial page

Link : https://learn.freecodecamp.org/responsive-web-design/basic-css/use-a-custom-css-variable/

On left section, at the bottom :

Apply the --penguin-skin variable to the background property of the pengiun-top class.
Apply the --penguin-skin variable to the background property of the pengiun-bottom class.

Link : https://learn.freecodecamp.org/responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable

On the code editor:

background: var(--**pengiun**-skin);
background: var(--**pengiun**-skin);

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