Fix typo in cl_ext_image_from_buffer specification (#901)

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

Author: kpet

extensions/cl_ext_image_from_buffer.asciidoc

@@ -56,7 +56,7 @@ object.
 
 == New API Enums
 
-Accepted value for the _param_name_ parameter to *clGetRequirementsInfoEXT*:
+Accepted value for the _param_name_ parameter to *clGetImageRequirementsInfoEXT*:
 
 [source,c]
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