Fix typos in the documentation of dynamic values in subview ops

[agrue]

I don't have push access, so please land this when it's accepted. Thanks.

mlir/include/mlir/Dialect/StandardOps/IR/Ops.td

let description = [{
     * strides: memref-rank number of strides that compose multiplicatively with
                the base memref strides in each dimension.
 
     The representation based on offsets, sizes and strides support a
     partially-static specification via attributes specified through the
     `static_offsets`, `static_sizes` and `static_strides` arguments. A special
     sentinel value ShapedType::kDynamicSize and
     ShapedType::kDynamicStrideOrOffset encodes that the corresponding entry has
-    a static value.
+    a dynamic value.
 
     A subview operation may additionally reduce the rank of the resulting view
     by removing dimensions that are statically known to be of size 1.
 
     Example 1:
 
     ```mlir
     %0 = alloc() : memref<64x4xf32, (d0, d1) -> (d0 * 4 + d1)>
let description = [{
 
     The subtensor operation supports the following arguments:
 
     * tensor: the "base" tensor from which to extract a subtensor.
     * offsets: tensor-rank number of offsets into the "base" tensor from which
                to extract the subtensor.
     * sizes: tensor-rank number of sizes which specify the sizes of the result
              tensor type.
-    * strides: tensor-rank number of strides specifying subsampling in each 
+    * strides: tensor-rank number of strides specifying subsampling in each
                dimension.
 
     The representation based on offsets, sizes and strides support a
     partially-static specification via attributes specified through the
     `static_offsets`, `static_sizes` and `static_strides` arguments. A special
     sentinel value ShapedType::kDynamicSize and
     ShapedType::kDynamicStrideOrOffset encodes that the corresponding entry has
-    a static value.
+    a dynamic value.
 
     After buffer-allocation, the "subtensor" op is expected to lower into a
     "subview" op.
 
     A subtensor operation may additionally reduce the rank of the resulting
     tensor by removing dimensions that are statically known to be of size 1.
 
     Example:
let description = [{
     * strides: tensor-rank number of strides that specify subsampling in each
                dimension.
 
     The representation based on offsets, sizes and strides support a
     partially-static specification via attributes specified through the
     `static_offsets`, `static_sizes` and `static_strides` arguments. A special
     sentinel value ShapedType::kDynamicSize and
     ShapedType::kDynamicStrideOrOffset encodes that the corresponding entry has
-    a static value.
+    a dynamic value.
 
     After buffer-allocation, the "subtensor_insert" op is expected to become
     an in-place buffer update.
   }];
 
   let arguments = (ins
     AnyRankedTensor:$source,
     AnyRankedTensor:$dest,