Work around missing dependencies on updated ubuntu-latest #3337

Job	Run time
Bitrot check	1m 12s
Latest build on ubuntu-latest	17s
Latest build on windows-latest	21s
Build target wasm32-wasi	37s
Book tests	15s
Latest build on macOS-latest	35s
Build target thumbv7em-none-eabihf	38s
Code coverage	7m 21s
Intra-doc links	42s
Test on ubuntu-latest	7m 32s
Test on windows-latest	7m 18s
Rustfmt	16s
Test on macOS-latest	7m 35s
	34m 39s

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