fs: Fix serving precompressed files without an extension #1123

# to view logs

Job	Run time
check	48s
check-docs	45s
cargo-hack	1m 13s
cargo-public-api-crates	49s
cargo-deny check (advisories)	21s
cargo-deny check (bans licenses sources)	18s
style	5s
test-msrv	1m 39s
test-versions (stable)	1m 42s
test-versions (beta)	1m 37s
test-versions (nightly)	1m 15s
	10m 32s

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