Replace 'component' with 'template' in integrations

[rotimi-best]

This PR is to address this issue #5.

The code snippets in the integrations is wrong and causes this error error when run.

TypeError: Cannot read properties of undefined (reading 'render')
    at Module.render (project_name/node_modules/svelte-email/render.js:10:14)
    at GET (project_name/src/routes/api/invite/teacher/+server.js:22:43)
    at Module.render_endpoint (project_name/node_modules/@sveltejs/kit/src/runtime/server/endpoint.js:49:24)

Instead of passing component into render, rather I have replaced it with template.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
svelte-email	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 21, 2023 0:10am

[Brandon-Ritchie]

This looks like a duplicate of This PR that is already open

[rotimi-best]

This looks like a duplicate of This PR that is already open

Thanks for pointing that out. Curious why it hasn't been merged in.