Fix link of axum-sessions in ECOSYSTEM.md (#2862) #4694

Job	Run time
cargo-hack	3m 7s
check-docs	25s
check	50s
cargo-public-api-crates (axum)	32s
cargo-deny check (advisories)	22s
cargo-public-api-crates (axum-core)	18s
dependencies-are-sorted	13s
cargo-deny check (bans licenses sources)	36s
cargo-public-api-crates (axum-extra)	33s
Spell Check with Typos	4s
cargo-public-api-crates (axum-macros)	20s
test-msrv	5m 52s
test-docs	1m 34s
armv5te-unknown-linux-musleabi	38s
test-versions (stable)	1m 24s
wasm32-unknown-unknown	25s
test-versions (beta)	1m 33s
test-nightly	1m 39s
	20m 25s

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