fix typo: visilibity -> visibility

Author: dconeybe

firebase-dataconnect/src/main/kotlin/com/google/firebase/dataconnect/EnumValue.kt

@@ -20,7 +20,7 @@ package com.google.firebase.dataconnect
  * Stores the value of an `enum` or a string if the string does not correspond to one of the enum's
  * values.
  */
-// TODO: Change the visilibity of `EnumValue` to `public` once it gets approval
+// TODO: Change the visibility of `EnumValue` to `public` once it gets approval
 //  by Firebase API Council.
 internal sealed interface EnumValue<out T : Enum<out T>> {
 

firebase-dataconnect/src/main/kotlin/com/google/firebase/dataconnect/serializers/EnumValueSerializer.kt

@@ -32,7 +32,7 @@ import kotlinx.serialization.encoding.Encoder
  * @param values The values of the enum to deserialize; for example, for an enum named `Foo` this
  * value should be `Foo.entries` or `Foo.values()`.
  */
-// TODO: Change the visilibity of `EnumValueSerializer` to `public` once it gets approval
+// TODO: Change the visibility of `EnumValueSerializer` to `public` once it gets approval
 //  by Firebase API Council.
 internal open class EnumValueSerializer<T : Enum<T>>(values: Iterable<T>) :
   KSerializer<EnumValue<T>> {