fix link fragments to dependabot options reference

[djbrown]

fix invalid link fragments leading to /code-security/dependabot/working-with-dependabot/dependabot-options-reference#...

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Table of review links

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Source	Review	Production	What Changed
code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
code-security/dependabot/dependabot-version-updates/customizing-dependabot-prs.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
code-security/dependabot/ecosystems-supported-by-dependabot/supported-ecosystems-and-repositories.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
code-security/dependabot/troubleshooting-dependabot/troubleshooting-dependabot-errors.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
code-security/dependabot/working-with-dependabot/configuring-multi-ecosystem-updates.md	fpt ghec	fpt ghec
code-security/dependabot/working-with-dependabot/managing-pull-requests-for-dependency-updates.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14
code-security/dependabot/working-with-dependabot/dependabot-options-reference.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14	from reusable
code-security/dependabot/dependabot-version-updates/about-dependabot-version-updates.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14	from reusable

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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[Sharra-writes]

@djbrown Wow, thanks for all those fixes! I'll get this added to the merge queue once checks are passing. 💛

Edit: Oops, looks like we need another review on this. I'll try to get that for you.

[felicitymay]

Thanks for your patience waiting to get a review from our team.

These updates are great. Many thanks for taking the time to fix the errors in these links.

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