[mlir][nvvm][NFC] Fix typo in TargetAttr (#144159)

Author: clementval

mlir/include/mlir/Dialect/LLVMIR/NVVMOps.td

@@ -3835,7 +3835,7 @@ def NVVM_DotAccumulate2WayOp : NVVM_Op<"dot.accumulate.2way"> {
 // NVVM target attribute.
 //===----------------------------------------------------------------------===//
 
-def NVVM_TargettAttr : NVVM_Attr<"NVVMTarget", "target", 
+def NVVM_TargetAttr : NVVM_Attr<"NVVMTarget", "target", 
   [DeclareAttrInterfaceMethods<GPUTargetAttrVerifyInterface>]> {
   let description = [{
     GPU target attribute for controlling compilation of NVIDIA targets. All