Fix the supported image formats table #1090

Job	Run time
build_benchmarks	48s
Fuzz targets (cargo-fuzz)	4m 8s
cargo-deny	20s
Fuzz targets (afl)	1m 44s
clippy	2m 13s
public_private_dependencies	19s
rustfmt	13s
test_avif	1m 18s
test_avif_decoding	1m 16s
test_big_endian	1m 3s
test_features	37s
test_big_endian (default)	2m 13s
test_toolchains (1.61.0)	58s
verify_msrv	58s
test_features (default)	1m 12s
test_big_endian (webp)	1m 19s
test_toolchains (nightly)	1m 50s
test_features (gif)	38s
test_big_endian (webp-encoder)	2m 12s
test_toolchains (beta)	1m 40s
test_features (jpeg)	35s
test_features (png)	41s
test_features (tiff)	44s
test_features (ico)	41s
test_features (pnm)	38s
test_features (tga)	34s
test_features (webp)	34s
test_features (bmp)	39s
test_features (hdr)	31s
test_features (dxt)	41s
test_features (dds)	41s
test_features (farbfeld)	37s
test_features (openexr)	51s
test_features (jpeg_rayon)	43s
test_features (webp-encoder)	1m 7s
	37m 16s

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