Fix typo

Author: sogartar

mlir/include/mlir/Dialect/Mesh/IR/MeshOps.td

@@ -680,7 +680,7 @@ def Mesh_ShiftOp : Mesh_CollectiveCommunicationOpBase<"shift", [
     SameOperandsAndResultElementType,
     SameOperandsAndResultShape
   ]> {
-  let summary = "Sift over a device mesh.";
+  let summary = "Shift over a device mesh.";
   let description = [{
     Within each device group shift along mesh axis `shift_axis` by an offset
     `offset`.

mlir/lib/Dialect/Mesh/IR/MeshOps.cpp

@@ -720,7 +720,7 @@ LogicalResult ShiftOp::verifySymbolUses(SymbolTableCollection &symbolTable) {
 void ShiftOp::getCanonicalizationPatterns(RewritePatternSet &patterns,
                                           MLIRContext *context) {
   // TODO: remove op when offset is 0 or if it is a rotate with and
-  // offset % sift_axis_mesh_dim_size == 0.
+  // offset % shift_axis_mesh_dim_size == 0.
 }
 
 //===----------------------------------------------------------------------===//