Fix delegate equatability in tutorial. (#2280)

Author: mbrandonw

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0000.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0001.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0002.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0004-previous.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0004.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0005.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       case cancel
       case saveContact(Contact)
     }

Sources/ComposableArchitecture/Documentation.docc/Tutorials/MeetTheComposableArchitecture/02-Navigation/01-YourFirstPresentation/02-01-04-code-0006.swift

@@ -9,7 +9,7 @@ struct AddContactFeature: ReducerProtocol {
     case delegate(Delegate)
     case saveButtonTapped
     case setName(String)
-    enum Delegate {
+    enum Delegate: Equatable {
       // case cancel
       case saveContact(Contact)
     }