DOC: Fix issue template [ci skip]

[larsoner]

The interior quotes either need to be escaped or changed to single quotes, the latter seemed simpler

[larsoner]

... otherwise you get:

$ python -c "import sys; print("Python", sys.version)"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'Python' is not defined

[skoudoro]

Thank you @larsoner, merging