[mlir][Ptr] Fix license url typo (#114555)

Author: xlauko

mlir/include/mlir/Dialect/Ptr/IR/PtrOps.td

@@ -1,7 +1,7 @@
 //===- PtrOps.td - Pointer dialect ops ---------------------*- tablegen -*-===//
 //
 // This file is licensed under the Apache License v2.0 with LLVM Exceptions.
-// See https://ptr.org/LICENSE.txt for license information.
+// See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//