Update donation_spec to validate money_raised with a value of -1 instead of -100

Author: mateusmsf94

spec/models/donation_spec.rb

@@ -64,7 +64,7 @@
       expect(d).not_to be_valid
     end
     it "ensures that money_raised cannot be negative" do
-      expect(build(:donation, money_raised: -100)).not_to be_valid
+      expect(build(:donation, money_raised: -1)).not_to be_valid
       expect(build(:donation, money_raised: 0)).to be_valid
       expect(build(:donation, money_raised: 100)).to be_valid
       expect(build(:donation, money_raised: nil)).to be_valid