Add missing semicolon

Signed-off-by: Matthias Kretz <[email protected]>

Author: mattkretz

src/taskblock.tex

@@ -45,7 +45,7 @@
 \rSec2[parallel.task_block.task_cancelled_exception.what]{\tcode{task_cancelled_exception} member function \tcode{what}}
 
 \begin{itemdecl}
-virtual const char* what() const noexcept
+virtual const char* what() const noexcept;
 \end{itemdecl}
 
 \begin{itemdescr}