docs(paginator): fix superfluous ] in overview example (#5448)

Author: jelbourn

src/material-examples/paginator-overview/paginator-overview-example.html

@@ -1,4 +1,4 @@
 <md-paginator [length]="100"
               [pageSize]="10"
-              [pageSizeOptions]="[5, 10, 25, 100]" ]>
+              [pageSizeOptions]="[5, 10, 25, 100]">
 </md-paginator>