[allocator.requirements.general] Fix typo in table's note (#4782)

Author: JohelEGP

source/lib-intro.tex

@@ -2110,7 +2110,7 @@
 An allocator need not support \tcode{allocate_at_least},
 but no default is provided in \tcode{allocator_traits}.
 If an allocator has an \tcode{allocate_at_least} member,
-it shall satisify the requirements.
+it shall satisfy the requirements.
 
 \pnum
 An allocator type \tcode{X} shall meet the