fixed KMunicate legend position in gallery.Rmd

[DanChaltiel]

Hi,

As you can see in https://www.danieldsjoberg.com/ggsurvfit/articles/gallery.html#kmunicate, the legend is not inside the plot as it should be.

This is because the theme lacks legend.position="inside".

This very minor PR should fix it.

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Reviewer Checklist (if item does not apply, mark as complete)

• [x] Ensure all package dependencies are installed by running renv::install()
• [x] PR branch has pulled the most recent updates from master branch. Ensure the pull request branch and your local version match and both have the latest updates from the master branch.
• [x] If a new function was added, function included in _pkgdown.yml
• [x] If a bug was fixed, a unit test was added for the bug check
• [x] Run pkgdown::build_site(). Check the R console for errors, and review the rendered website.
• [x] Overall code coverage remains >99.5%. Review coverage with withr::with_envvar(list(CI = TRUE), code = devtools::test_coverage()). Begin in a fresh R session without any packages loaded.
• [x] R CMD Check runs without errors, warnings, and notes
• [x] usethis::use_spell_check() runs with no spelling errors in documentation

When the branch is ready to be merged into master:

• [ ] Update NEWS.md with the changes from this pull request under the heading "# ggsurvfit (development version)". If there is an issue associated with the pull request, reference it in parentheses at the end update (see NEWS.md for examples).
• [ ] Increment the version number using usethis::use_version(which = "dev")
• [ ] Run usethis::use_spell_check() again
• [ ] Approve Pull Request
• [ ] Merge the PR. Please use "Squash and merge".

[ddsjoberg]

Thank you so much @DanChaltiel ! Would you mind adding a snapshot test using vdiffr::expect_doppelganger() so we can ensure this doesn't break again in the future (I am pretty sure this worked before the ggplot2 3.5 release)