[child-table] fix typo in constant name (#2826)

src/core/thread/child_table.cpp

@@ -265,7 +265,7 @@ bool ChildTable::MatchesFilter(const Child &aChild, StateFilter aFilter)
         rval = (aChild.GetState() != Child::kStateInvalid);
         break;
 
-    case kInStateAnyExceptValidOrRestoing:
+    case kInStateAnyExceptValidOrRestoring:
         rval = !aChild.IsStateValidOrRestoring();
         break;
     }

src/core/thread/child_table.hpp

@@ -58,12 +58,12 @@ public:
      */
     enum StateFilter
     {
-        kInStateValid,                    ///< Accept child only in `Child::kStateValid`.
-        kInStateValidOrRestoring,         ///< Accept child with `Child::IsStateValidOrRestoring()` being `true`.
-        kInStateChildIdRequest,           ///< Accept child only in `Child:kStateChildIdRequest`.
-        kInStateValidOrAttaching,         ///< Accept child with `Child::IsStateValidOrAttaching()` being `true`.
-        kInStateAnyExceptInvalid,         ///< Accept child in any state except `Child:kStateInvalid`.
-        kInStateAnyExceptValidOrRestoing, ///< Accept child in any state except `Child::IsStateValidOrRestoring()`.
+        kInStateValid,                     ///< Accept child only in `Child::kStateValid`.
+        kInStateValidOrRestoring,          ///< Accept child with `Child::IsStateValidOrRestoring()` being `true`.
+        kInStateChildIdRequest,            ///< Accept child only in `Child:kStateChildIdRequest`.
+        kInStateValidOrAttaching,          ///< Accept child with `Child::IsStateValidOrAttaching()` being `true`.
+        kInStateAnyExceptInvalid,          ///< Accept child in any state except `Child:kStateInvalid`.
+        kInStateAnyExceptValidOrRestoring, ///< Accept child in any state except `Child::IsStateValidOrRestoring()`.
     };
 
     /**

src/core/thread/mesh_forwarder_ftd.cpp

@@ -222,7 +222,8 @@ exit:
 
 void MeshForwarder::UpdateIndirectMessages(void)
 {
-    for (ChildTable::Iterator iter(GetInstance(), ChildTable::kInStateAnyExceptValidOrRestoing); !iter.IsDone(); iter++)
+    for (ChildTable::Iterator iter(GetInstance(), ChildTable::kInStateAnyExceptValidOrRestoring); !iter.IsDone();
+         iter++)
     {
         if (iter.GetChild()->GetIndirectMessageCount() == 0)
         {

tests/unit/test_child_table.cpp

@@ -97,7 +97,7 @@ static bool StateMatchesFilter(Child::State aState, ChildTable::StateFilter aFil
         rval = child.IsStateValidOrAttaching();
         break;
 
-    case ChildTable::kInStateAnyExceptValidOrRestoing:
+    case ChildTable::kInStateAnyExceptValidOrRestoring:
         rval = !child.IsStateValidOrRestoring();
         break;
     }