Update littlefs

[sosthene-nitrokey]

Depends on

• Update littlefs2 trussed-dev/trussed#208
• Remove need for generic array and typenum constants trussed-dev/littlefs2#101

[nitrokey-ci]

No significant changes.

Insignifcant changes

metric	value		change
binary-size-nk3am	1,447,795	🔴	+540 (+0.04%)
binary-size-nk3am-test	1,883,123	✅	-225 (-0.01%)
binary-size-nk3xn	517,216	✅	-88 (-0.02%)
binary-size-nk3xn-test	517,280	✅	-104 (-0.02%)
binary-size-nkpk	647,439	✅	-3,436 (-0.53%)