fix: update csp.mdx

[jsparkdev]

Description (required)

Update incorrect order, method names, description formatting, etc.

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en/reference/experimental-flags/csp.mdx	Source changed, localizations will be marked as outdated.

Warnings reference

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🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.

[ArmandPhilippot]

Nice catches, @jsparkdev!
I just have a doubt regarding the order of script-src and style-src. Did you saw that by testing yourself?
Otherwise, all the other changes looks good to me!

[ArmandPhilippot]

It seems I was looking at the wrong place for the script-src/style-src order. So everything LGTM! Thanks! 🙌🏽

[sarah11918]

All the renaming etc. checks out with the code, thank you @jsparkdev !

I've asked about the one outstanding comment, and once that is resolved, this PR should be good to go!

[jsparkdev]

@sarah11918 @ArmandPhilippot

Thank you all for your reviews.

I've noticed myself that enabling experimental.csp always brings up the style source first, but this appears to be a bug.

If I'm right about the bug, I've requested a bug fix in withastro/astro#13905 and will update the documentation once it's merged.

[sarah11918]

Thank you @jsparkdev - amazing catches, as always!