fix: inverse the optional made in #284 to match #282

[juliusmarminge]

Fixes #284 by matching #282

• I reviewed linter warnings + errors, resolved formatting, types and other issues related to my work
• The PR title follows the convention we established conventional-commit
• I performed a functional test on my final commit

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Main:

create-t3-app/template/addons/next-auth/next-auth.d.ts

Lines 7 to 11 in 6a81f03

	interface Session {
	user?: {
	id: string;
	} & DefaultSession["user"];
	}

Next:

create-t3-app/template/addons/next-auth/next-auth.d.ts

Lines 7 to 11 in 7627d22

	interface Session {
	user: {
	id?: string;
	} & DefaultSession["user"];
	}

---