[BUGFIX] Indexed search broken due to wrong namespace in template

An oldschool namespace usage broke the indexed_search module
after moving all ClassAlias files.

Resolves: #63059
Releases: master
Change-Id: I8b5fd48ce4a3345db2ce55a2af59120b55eaaee0
Reviewed-on: http://review.typo3.org/34326


Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>

typo3/sysext/indexed_search/Resources/Private/Templates/Search/Search.html

-{namespace is=Tx_IndexedSearch_ViewHelpers}
+{namespace is=TYPO3\CMS\IndexedSearch\ViewHelpers}
 
 <f:for each="{resultsets}" as="result">
 	<f:if condition="{result.categoryTitle}">
 		<h1 class="tx-indexedsearch-category">{result.categoryTitle}</h1>
 	</f:if>
-	
+
 	<!-- show the info what was searched for -->
 	<f:for each="{searchWords}" as="searchWord" key="key">
 		<f:if condition="{key} > 0">