Fix spelling of behavior in anchor

[maximiliankolb]

What changes are you introducing?

Fix spelling

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

downstream CI reports spelling error

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

'rg -i "webhook-behaviour-and-integration"' does not return any results, so this anchor is not in use.

Contributor checklists

• I am okay with my commits getting squashed when you merge this PR.
• I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• Foreman 3.18/Katello 4.20 (Satellite 6.19)
• Foreman 3.17/Katello 4.19
• Foreman 3.16/Katello 4.18 (Satellite 6.18; orcharhino 7.6, 7.7, and 7.8)
• Foreman 3.15/Katello 4.17
• Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4; orcharhino 7.5)
• Foreman 3.13/Katello 4.15 (EL9 only)
• Foreman 3.12/Katello 4.14 (Satellite 6.16; orcharhino 7.2 on EL9 only; orcharhino 7.3)
• We do not accept PRs for Foreman older than 3.12.

[github-actions]

The PR preview for 8e66a1e is available at theforeman-foreman-documentation-preview-pr-4816.surge.sh

The following output files are affected by this PR:

• Administering_Project/index-foreman-deb.html
• Administering_Project/index-foreman-el.html
• Administering_Project/index-foremanctl-katello.html
• Administering_Project/index-foremanctl-orcharhino.html
• Administering_Project/index-foremanctl-satellite.html
• Administering_Project/index-katello.html
• Administering_Project/index-orcharhino.html
• Administering_Project/index-satellite.html

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