[Spelling] Added missing "be"

[abergs]

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[emlun]

Thanks!

[abergs]

@emlun I created a w3c acc. and linked my GH since the IPR checked failed otherwise, but can't seem to revalidate.

[emlun]

I think we'll need help from @nadalin, @wseltzer or @samuelweiler for that.

[samuelweiler]

Marked as non substantive for IPR from ash-nazg.

[samuelweiler]

@emlun Thanks for the tag.

@abergs Thank you. The IPR checks won't automatically work unless you join the working group, thereby making an IPR commitment. If you're interested in that, particularly if you would like to make more substantive improvements to the spec, please reach out to me. In this case, a typo does not create IPR issues, so I can just click the button and make this all work.

[emlun]

Thanks @samuelweiler!