Test

Improve interior mutability slide #4535

Job	Run time
format	34s
bare-metal (src/bare-metal/alloc-example, aarch64-unknown-none)	26s
find-languages	4s
cargo (ubuntu-latest)	24s
bare-metal (src/bare-metal/aps/examples, aarch64-unknown-none)	38s
cargo (macos-latest)	59s
bare-metal (src/bare-metal/microcontrollers/examples, thumbv7em-none-eabihf)	43s
bare-metal (src/exercises/bare-metal/compass, thumbv7em-none-eabihf)	1m 17s
bare-metal (src/exercises/bare-metal/rtc, aarch64-unknown-none)	29s
build (bn)	2m 32s
build (da)	2m 32s
build (de)	2m 28s
build (el)	2m 34s
build (en)	2m 59s
build (es)	2m 33s
build (fa)	2m 31s
build (fr)	2m 34s
build (id)	2m 50s
build (it)	2m 28s
build (ja)	2m 31s
build (ko)	2m 31s
build (pl)	2m 59s
build (pt-BR)	2m 25s
build (ro)	2m 48s
build (ru)	2m 28s
build (tr)	2m 50s
build (uk)	2m 35s
build (zh-CN)	2m 48s
build (zh-TW)	2m 22s
	57m 52s

Provide feedback