Fix typo: 'intrinstc' -> 'intrinsic'

PiperOrigin-RevId: 241058978

tensorflow_federated/proto/v0/computation.proto

@@ -102,7 +102,7 @@ message Computation {
     // TensorFlow computation. TensorFlow computations have functional type
     // signatures that cannot contain FederatedTypes, as they execute locally.
     // In order to construct a TensorFlow computation that maps a federated
-    // value pointwise, one must use a federated map intrinstc (to be defined).
+    // value pointwise, one must use a federated map intrinsic (to be defined).
     //
     // TODO(b/113112455): Start defining the standard intrinsics and reference
     // them here and elsewhere as appropriate.