Doc: Fix typo. (#7974)

imgui.cpp

@@ -9046,7 +9046,7 @@ bool ImGui::IsKeyPressed(ImGuiKey key, bool repeat)
     return IsKeyPressed(key, repeat ? ImGuiInputFlags_Repeat : ImGuiInputFlags_None, ImGuiKeyOwner_Any);
 }
 
-// Important: unless legacy IsKeyPressed(ImGuiKey, bool repeat=true) which DEFAULT to repeat, this requires EXPLICIT repeat.
+// Important: unlike legacy IsKeyPressed(ImGuiKey, bool repeat=true) which DEFAULT to repeat, this requires EXPLICIT repeat.
 bool ImGui::IsKeyPressed(ImGuiKey key, ImGuiInputFlags flags, ImGuiID owner_id)
 {
     const ImGuiKeyData* key_data = GetKeyData(key);