Update infrastructure-providers.mdx

[Fyvel]

Fix typo for terraform apply "plan" command

[what-the-diff]

PR Summary

• Typographical Error Correction
  A mistake in the spelling of a crucial command has been rectified within an important infrastructure file. The correction ensures the command, which was previously incorrectly written as "terrafom," now reads as "terraform." This will help users who would be using the script by eliminating any possible confusion or errors that might occur due to the typing error.

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[javiertoledo]

LGTM, thank you @Fyvel!