DemosFix typo in help text in demo Tables/Borders (#7780)

The help text for flags had a "V" flag duplicated, this change corrects it to the missing "H" flag.

Author: hevrard

imgui_demo.cpp

@@ -4221,7 +4221,7 @@ static void ShowDemoWindowTables()
         PushStyleCompact();
         ImGui::CheckboxFlags("ImGuiTableFlags_RowBg", &flags, ImGuiTableFlags_RowBg);
         ImGui::CheckboxFlags("ImGuiTableFlags_Borders", &flags, ImGuiTableFlags_Borders);
-        ImGui::SameLine(); HelpMarker("ImGuiTableFlags_Borders\n = ImGuiTableFlags_BordersInnerV\n | ImGuiTableFlags_BordersOuterV\n | ImGuiTableFlags_BordersInnerV\n | ImGuiTableFlags_BordersOuterH");
+        ImGui::SameLine(); HelpMarker("ImGuiTableFlags_Borders\n = ImGuiTableFlags_BordersInnerV\n | ImGuiTableFlags_BordersOuterV\n | ImGuiTableFlags_BordersInnerH\n | ImGuiTableFlags_BordersOuterH");
         ImGui::Indent();
 
         ImGui::CheckboxFlags("ImGuiTableFlags_BordersH", &flags, ImGuiTableFlags_BordersH);