chor: correct misspellings (#352)

frontend/src/routes/+layout.svelte

@@ -31,7 +31,7 @@
 
 {#if !appConfig}
 	<Error
-		message="A critical error occured. Please contact your administrator."
+		message="A critical error occurred. Please contact your administrator."
 		showButton={false}
 	/>
 {:else}

frontend/src/routes/login/alternative/email/+page.svelte

@@ -21,7 +21,7 @@
 		await userService
 			.requestOneTimeAccessEmail(email, data.redirect)
 			.then(() => (success = true))
-			.catch((e) => (error = e.response?.data.error || 'An unknown error occured'));
+			.catch((e) => (error = e.response?.data.error || 'An unknown error occurred'));
 
 		isLoading = false;
 	}