[docs]Fix a typo around '#pragma clang section' (#119791)

Author: mingmingl-llvm

clang/docs/LanguageExtensions.rst

@@ -5551,7 +5551,7 @@ The ``#pragma clang section`` directive obeys the following rules:
 * Global variables that are initialized to zero will be placed in the named
   bss section, if one is present.
 
-* The ``#pragma clang section`` directive does not does try to infer section-kind
+* The ``#pragma clang section`` directive does not try to infer section-kind
   from the name. For example, naming a section "``.bss.mySec``" does NOT mean
   it will be a bss section name.