Add axum-html-minifier to ECOSYSTEM.md #5307

Job	Run time
check	2m 20s
cargo-hack	6m 26s
check-docs	47s
cargo-public-api-crates (axum)	51s
cargo-public-api-crates (axum-core)	39s
cargo-deny check (advisories)	25s
cargo-public-api-crates (axum-extra)	49s
dependencies-are-sorted	38s
cargo-deny check (bans licenses sources)	27s
Spell Check with Typos	7s
cargo-public-api-crates (axum-macros)	38s
test-msrv	2m 40s
test-nightly	1m 39s
test-versions (stable)	3m 57s
test-versions (beta)	3m 53s
armv5te-unknown-linux-musleabi	1m 3s
wasm32-unknown-unknown	19s
test-docs	2m 4s
	29m 42s

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