add rust-analyzer to the toolchain

this should avoid the following error when trying to rust the LSP in a toolchain which does not have the rust-analyzer component and without running rustup component add rust-analyzer manually:

error: Unknown binary 'rust-analyzer' in official toolchain 'stable-x86_64-unknown-linux-gnu'.

added improvement label

assigned to @a.stevan

added 1 commit

• 22ac6163 - format TOML

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enabled an automatic merge when all merge checks for 22ac6163 pass

merged

mentioned in commit 11a5b59d

mentioned in commit e9798fac