typo fix in DisagnosticsProvider

[ericmuckley]

A typo was fixed in DiagnosticsProvider.ts where a closing curly brace was missing after $bindable().

Old:

 "Cannot use 'bind:' with this property. It is declared as non-bindable inside the component.\n" +
`To mark a property as bindable: 'let { ${propName} = $bindable() = $props()'`;

New:

 "Cannot use 'bind:' with this property. It is declared as non-bindable inside the component.\n" +
`To mark a property as bindable: 'let { ${propName} = $bindable() } = $props()'`;

[jasonlyu123]

Thanks!