AdamicAdarDistance fails on CI occasionally

[fabratu]

AdamicAdarDistance fails on all systems occasionally. Example log (from Linux release build):

53: [----------] 60 tests from InstantiationName/DistanceGTest
53: [ RUN      ] InstantiationName/DistanceGTest.testAdamicAdar/0
53: /home/runner/work/networkit/networkit/networkit/cpp/distance/test/DistanceGTest.cpp:169: Failure
53: Expected: (AAD.distance(source, target)) > (1), actual: 0.71650844142670367 vs 1
53: 
53: [  FAILED  ] InstantiationName/DistanceGTest.testAdamicAdar/0, where GetParam() = (false, false) (8 ms)