change percent to % so that suffix is consistent with other similar questions

app/models/form/sales/questions/staircase_bought.rb

@@ -8,6 +8,6 @@ class Form::Sales::Questions::StaircaseBought < ::Form::Question
     @width = 5
     @min = 0
     @max = 100
-    @suffix = " percent"
+    @suffix = "%"
   end
 end

app/models/form/sales/questions/staircase_owned.rb

@@ -8,6 +8,6 @@ class Form::Sales::Questions::StaircaseOwned < ::Form::Question
     @width = 5
     @min = 0
     @max = 100
-    @suffix = " percent"
+    @suffix = "%"
   end
 end

spec/models/form/sales/questions/staircase_bought_spec.rb

@@ -44,7 +44,7 @@ RSpec.describe Form::Sales::Questions::StaircaseBought, type: :model do
   end
 
   it "has correct suffix" do
-    expect(question.suffix).to eq(" percent")
+    expect(question.suffix).to eq("%")
   end
 
   it "has correct min" do

spec/models/form/sales/questions/staircase_owned_spec.rb

@@ -44,7 +44,7 @@ RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
   end
 
   it "has correct suffix" do
-    expect(question.suffix).to eq(" percent")
+    expect(question.suffix).to eq("%")
   end
 
   it "has correct min" do