src/sage/symbolic/integration/integral.py: update expected giac output

One "giac" integral in this file has changed its output slightly now
that the "giac" algorithm uses libgiac as opposed to the pexpect
interface. The difference between the new and old expected outputs
full_simplify() to zero, so this one is nothing to worry about.

src/sage/symbolic/integration/integral.py

@@ -62,7 +62,7 @@ def __init__(self):
             sage: # needs sage.libs.giac
             sage: Ex = (1-2*x^(1/3))^(3/4)/x
             sage: integrate(Ex, x, algorithm='giac')  # long time
-            4*(-2*x^(1/3) + 1)^(3/4) + 6*arctan((-2*x^(1/3) + 1)^(1/4)) - 3*log((-2*x^(1/3) + 1)^(1/4) + 1) + 3*log(abs((-2*x^(1/3) + 1)^(1/4) - 1))
+            4*(-2*x^(1/3) + 1)^(3/4) + 6*arctan((-2*x^(1/3) + 1)^(1/4)) - 3*log(abs((-2*x^(1/3) + 1)^(1/4) + 1)) + 3*log(abs((-2*x^(1/3) + 1)^(1/4) - 1))
 
         Check for :issue:`29833`::