Bug: fix example SQL for periodId in config.qfq.ini

extension/Documentation/Manual.rst

@@ -444,7 +444,7 @@ Example: *typo3conf/config.qfq.ini*
 	; Local Documentation (doc fits to installed version):  typo3conf/ext/qfq/Documentation/html/Manual.html
 	;DOCUMENTATION_QFQ = https://docs.typo3.org/typo3cms/drafts/github/T3DocumentationStarter/Public-Info-053/Manual.html
 
-	;VAR_ADD_BY_SQL = {{!SELECT s.id AS _periodId FROM Period AS s WHERE s.start<=NOW() ORDER BY s.start DESC LIMIT 1}}
+	;VAR_ADD_BY_SQL = 'SELECT s.id AS _periodId FROM Period AS s WHERE s.start<=NOW() ORDER BY s.start DESC LIMIT 1'
 
 	;FORM_LANGUAGE_A_ID = 1
 	;FORM_LANGUAGE_A_LABEL = english
@@ -508,7 +508,7 @@ The QFQ approach works without a marker and without manual intervention: the whi
 
 In `config.qfq.ini`: ::
 
-	VAR_ADD_BY_SQL = SELECT id AS periodId FROM Period WHERE start<=NOW() ORDER BY start DESC LIMIT 1
+	VAR_ADD_BY_SQL = 'SELECT id AS periodId FROM Period WHERE start<=NOW() ORDER BY start DESC LIMIT 1'
 
 a variable 'periodId' will automatically computed and filled in STORE SYSTEM. Access it via `{{periodId:Y0}}`.
 To get the name and current period: ::