Tabs not displaying correctly when title contains "``" or guilabel

[filipesmg]

Describe the bug

context
When I create tabs containing in-line raw text (using double ticks as example) or :guilabel:label on the title.

expectation
I expected the tabs to have no border at the bottom, consistent with other cases.

bug
But instead the other tabs get an extra line at the bottom when they are selected (see attached image).
Here's the code I used to create

Reproduce the bug

Here is an example code that I used to create the attached images.

.. tabs::

    .. tab:: ``tab1``

        test test test test test test test test 

    .. tab:: Tab2

        test test test test test test test test 

.. tabs::

    .. tab:: ``tab1``

        test test test test test test test test 

    .. tab:: Tab2

        test test test test test test test test 

.. tabs::

    .. tab:: Tab1

        test test test test test test test test 

    .. tab:: :guilabel:`Tab2`

        test test test test test test test test 

.. tabs::

    .. tab:: Tab1

        test test test test test test test test 

    .. tab:: :guilabel:`Tab2`

        test test test test test test test test 

List your environment

I'm on MacOS 12.2.1, python 3.9.5 and:

Sphinx                        4.4.0
sphinx-rtd-theme              1.0.0
sphinx-tabs                   3.2.0

But I have also tested sphinx-tabs 3.3.0.

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