[BUGFIX] Update Autocomplete widget template ajax url

Update the template to not generate a url containing & which results
in not working ajax call.

Releases: master, 9.5
Resolves: #90091
Change-Id: If164f1a4c5d4aa6bf7cb830b27ed5ac5d5d5d525
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/62849


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Frank Nägler <frank.naegler@typo3.org>
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Frank Nägler <frank.naegler@typo3.org>

typo3/sysext/fluid/Resources/Private/Templates/ViewHelpers/Widget/Autocomplete/Index.html

 <script type="text/javascript">
 jQuery(function() {
     jQuery("#{id}").autocomplete(<f:format.raw value="{" />
-        source: "{f:widget.uri(action:'autocomplete', ajax: 1)}",
+        source: <f:format.raw>"{f:widget.uri(action:'autocomplete', ajax: 1)}"</f:format.raw>,
         minLength: 2
     });
 });