patch 9.1.0134: CI: Test_term_gettitle() is flaky on MacOS 14

patch 9.1.0134: CI: Test_term_gettitle() is flaky on MacOS 14

Problem:  Test_term_gettitle() is flaky on MacOS 14 and Github runners
Solution: Skip the test on Github CI

closes: #14085

It fails with this: '^\\[No Name\\] - VIM\\d*$' does not match 'e] - VIM'
It is not clear why term_gettitle() only get's the last part of the
expected title (perhaps there is a Carriage return in there or the
terminal window is too small?)

So let's just skip this test for now.

Signed-off-by: Christian Brabandt <cb@256bit.org>