PR50708: Update link to Intel SIMD ABI

Author: dwblaikie

llvm/docs/LangRef.rst

@@ -2098,7 +2098,7 @@ attributes are supported:
     determined by the rules of the Vector Function ABI (VFABI)
     specifications of the target. For Arm and X86, the VFABI can be
     found at https://github.com/ARM-software/abi-aa and
-    https://software.intel.com/en-us/articles/vector-simd-function-abi,
+    https://software.intel.com/content/www/us/en/develop/download/vector-simd-function-abi.html,
     respectively.
 
     For X86 and Arm targets, the values of the tokens in the standard