[algorithms.parallel.overloads] Rename subclause title

Fixes NB US 156-254 (C++26 CD).

Author: jensmaurer

source/algorithms.tex

@@ -593,7 +593,7 @@
 if the invocation of an element access function exits via an uncaught exception,
 the behavior is determined by the execution policy.
 
-\rSec2[algorithms.parallel.overloads]{\tcode{ExecutionPolicy} algorithm overloads}
+\rSec2[algorithms.parallel.overloads]{Parallel algorithm overloads}
 
 \pnum
 Parallel algorithms are algorithm overloads.