chore(deps): update dependency nethserver/nethsecurity-ui to v2.15.6

[renovate]

This PR contains the following updates:

Package	Update	Change
NethServer/nethsecurity-ui	minor	2.14.0 → 2.15.6

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Release Notes

NethServer/nethsecurity-ui (NethServer/nethsecurity-ui)

v2.15.6

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Bug Fixes

• flows: showing url domain if available (066c5e9)

v2.15.5

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Bug Fixes

• dashboard: get total memory from meminfo (#​726) (e1e9074)

v2.15.4

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Bug Fixes

• bond: added placeholder (3db9949)

v2.15.3

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Bug Fixes

• limiting bond name to 2 characters (51247e0)

v2.15.2

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Bug Fixes

• flows: adjusted few apps warning (b9948a7)

v2.15.1

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Bug Fixes

• flows adjustments (02eeda0)
• port-forward: update traffic type handling in form reset logic (#​717) (b4ee4d6)

v2.15.0

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Features

• added netifyd flows (#​675) (6a51f53)
• openvpn-rw: add certificates renewal functionalities (#​707) (d82b627)
• port-forward: improve usability of the create and edit port-forward modal (#​704) (c32d365)

Bug Fixes

• dpi: updated application count (#​712) (e17bc2a)
• multiwan-rules: improve condition checks for source and destination objects on edit drawer (#​709) (7bf1635)

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