refactor(corrections-overview): section instead of div

templates/corrections-overview.hamlet

@@ -1,4 +1,5 @@
-<div>
+$newline never
+<section>
   <h2>_{MsgCorrectionSheets}
 
   _{MsgCourseParticipants nrParticipants}
@@ -43,8 +44,7 @@
           <td .table__td>#{showAvgsDays ciTot ciCorrected}
           <td .table__td>#{showDiffDays ciMax}
 
-
-<div>
+<section>
   <h2>_{MsgCorrectionCorrectors}
 
   <table .table .table--striped .table--hover>
@@ -142,5 +142,6 @@
             ^{simpleLink (toWidget shn) (CSheetR tid ssh csh shn SShowR)}
 
   ^{btnWdgt}
- <div>
+
+ <section>
   <p>_{MsgAssignSubmissionsRandomWarning}