fix: make it more flaky

Author: thomasrockhu-codecov

app/test_calculator.py

@@ -3,7 +3,7 @@
 
 
 def test_flaky():
- assert random.random() <= 0.8
+ assert random.random() <= 0.5
 
 def test_add():
  assert Calculator.add(1, 2) == 3.0