[3.12] gh-110746: Improve markup in ``tkinter.ttk.rst`` (GH-111236) (#113193)

gh-110746: Improve markup in ``tkinter.ttk.rst`` (GH-111236)

* gh-110746: Improve markup in tkinter.ttk.rst

* gh-110746: Improve markup in tkinter.ttk.rst

* 📜🤖 Added by blurb_it.

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(cherry picked from commit 00d2b6d1fca91e1a83f7f99a370685b095ed4928)

Co-authored-by: Akshat Khandelwal <35228810+akshatgokul@users.noreply.github.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>