Bad anchor in Identity Provider headings

[vcampitelli]

As we're using a custom prop to render headings at the Identity Provider Operations, their anchors are being rendered with the propsidp_display_name text instead of the actual name.

E.g. https://fusionauth.io/docs/apis/identity-providers/epicgames#create-the-propsidp_display_name-identity-provider

We'd probably need to fix the way Astro is rendering headings from MDX files.

[mooreds]

Hmmm. Does this block #2917 ?

[vcampitelli]

Nope, as it's already broken in production.

#2917 will work fine with the bad anchors, and if we ever fix this one, we'd just need to do a similar strategy with the slug in astro/src/pages/docs/[...slug].astro