fix: dashboard onMount issue (rare)

packages/dashboard/src/routes/(static)/get-started/RegisterForm.svelte

@@ -7,6 +7,7 @@
   import NewInstanceProcessingBlock from './NewInstanceProcessingBlock.svelte'
   import Fa from 'svelte-fa'
   import { faArrowRight, faRotate } from '@fortawesome/free-solid-svg-icons'
+  import { onMount } from 'svelte'
 
   export let isSignUpView: boolean = false
   let isProcessing: boolean = false
@@ -30,6 +31,7 @@
     instanceNameField.set(name)
   }
 
+  onMount(() => {
     instanceNameField.subscribe(async (name) => {
       if (name === $instanceInfo.name) return
       try {
@@ -56,8 +58,11 @@
         }))
       }
     })
+  })
 
+  onMount(() => {
     generateSlug()
+  })
 
   // Set up the variables to hold the form information
   let email: string = ''