Fix broken ImageReader link #1495

Job	Run time
Fuzz targets (afl)	2m 18s
build_benchmarks	44s
cargo-deny	24s
Fuzz targets (cargo-fuzz)	50s
cargo-semver-checks	30s
clippy	2m 7s
public_private_dependencies	23s
rustfmt	6s
test_avif_decoding	1m 28s
test_features	26s
test_other_archs (powerpc-unknown-linux-gnu)	2m 39s
test_features (default)	1m 45s
test_toolchains (1.67.1)	37s
test_features (rayon)	30s
test_other_archs (i686-unknown-linux-gnu)	1m 39s
test_toolchains (nightly)	1m 51s
test_features (avif)	53s
test_toolchains (beta)	1m 28s
test_features (bmp)	27s
test_features (dds)	30s
test_features (exr)	43s
test_features (ff)	26s
test_features (gif)	33s
test_features (hdr)	26s
test_features (ico)	2m 26s
test_features (jpeg)	31s
test_features (png)	39s
test_features (pnm)	30s
test_features (qoi)	22s
test_features (tga)	28s
test_features (tiff)	32s
test_features (webp)	30s
	29m 41s

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