devtools could be using `{.run ...}` more

[jennybc]

Noticed while working on something else. I think these are all (?) places where devtools could use cli's {.run ...} construct instead of just .code. Some (but not all) of these packages are the blessed ones, but it's neutral-to-positive either way. All the sitrep.R and install.R stuff is involved in a PR I'm about to make, but I want to deal with the others when I'm done.

File	Line	Current	Suggested
R/sitrep.R	241	{.code {update_code}}	{.run {update_code}}
R/sitrep.R	251	{.code {update_code}}	{.run {update_code}}
R/install.R	257	{.code pak::local_install_dev_deps()}	{.run pak::local_install_dev_deps()}
R/test.R	35	{.code usethis::use_testthat()}	{.run usethis::use_testthat()}
R/release.R	222	{.code use_cran_comments()}	{.run use_cran_comments()}

FYI here are the current blessed packages:

• testthat
• rlang
• devtools
• usethis
• pkgload
• pkgdown

Blessed packages in RStudio: https://github.com/rstudio/rstudio/blob/53842c110064f12923336c702d2ecd186f6c452c/src/cpp/session/modules/SessionPackages.R#L1166-L1175

Blessed packages in Positron: https://github.com/posit-dev/positron/blob/6fe4953badda8756c4e2abd1096ad40917d8facd/extensions/positron-r/src/hyperlink.ts#L89-L92