Broken references in AV1 Codec ISO Media File Format Binding

[github-actions]

This pull request was automatically created by Strudy upon detecting errors in AV1 Codec ISO Media File Format Binding.

Please check that these errors were correctly detected, and that they have not already been reported in https://github.com/AOMediaCodec/av1-isobmff.

If everything is OK, you can merge this pull request which will report the issue below to the repo, and update the underlying report file with a link to the said issue.

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Repo: 'https://github.com/AOMediaCodec/av1-isobmff'
Tracked: N/A
Title: Broken references in AV1 Codec ISO Media File Format Binding

While crawling AV1 Codec ISO Media File Format Binding, the following links to other specifications were detected as pointing to non-existing anchors:

• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=1
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=39
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=13
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=121
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=2
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=218
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=41
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=40
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=44
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=46
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=45
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=49
• https://aomediacodec.github.io/av1-spec/av1-spec.pdf#page=71

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}

[dontcallmedom]

the script needs either to verification on PDF specs, or learn how to check whether PDF references exist