[3.13] Fix a typo in ``Doc/tutorial/errors.rst`` exception output (GH-126001) (#126009)

Fix a typo in ``Doc/tutorial/errors.rst`` exception output (GH-126001)
(cherry picked from commit a78d5b32429e2399178ac838e0e62b2bd62c0af9)

Co-authored-by: Bogdana Vereha <bogdanap@github.com>