[SYCL][Doc] Remove accidental /

Signed-off-by: John Pennycook <[email protected]>

Author: Pennycook

sycl/doc/extensions/GroupAlgorithms/SYCL_INTEL_group_algorithms.asciidoc

@@ -118,7 +118,7 @@ The following function objects alias objects in the +<functional>+ header from t
 - +cl::sycl::intel::bit_xor+
 - +cl::sycl::intel::logical_and+
 - +cl::sycl::intel::logical_or+
-/
+
 New function objects without {cpp} standard library equivalents are defined in the table below:
 
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