docs: fix dead links to d1 platform directories (#330) #923

Job	Run time
netlify_dryrun	2m 47s
docs	2m 25s
just clippy	4m 41s
just check	4m 25s
rustfmt	19s
cargo miri test --package forth3 (host)	1m 19s
cargo build mnemos-d1	1m 37s
just test	2m 26s
cargo build mnemos-esp32c3-buddy	57s
cargo build mnemos-x86_64-bootloader	2m 16s
all systems go!	1s
	23m 13s

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