Bump vuetify from 2.6.11 to 2.6.12 in /webapp

Bumps vuetify from 2.6.11 to 2.6.12.

Release notes

Sourced from vuetify's releases.

v2.6.12

🔧 Bug Fixes

• VCalendar: display name on all-day events in event slot (30b7281), closes #15915
• VCombobox: emit paste event (7417807), closes #11186
• VFileInput: label click opens dialog twice (#15902) (7c9f717), closes #15888
• VStepper: increate error label selector specificity (785de11), closes #15886

Other Commits

• chore(ci): skip percy tests if no changes (1b22a66)
• chore(VDialog): correct "disabled" spelling error in test name (#15800) (1165658)

Commits

• 55d302f chore(release): publish v2.6.12
• 1165658 chore(VDialog): correct "disabled" spelling error in test name (#15800)
• 7c9f717 fix(VFileInput): label click opens dialog twice (#15902)
• 785de11 fix(VStepper): increate error label selector specificity
• 30b7281 fix(VCalendar): display name on all-day events in event slot
• 7417807 fix(VCombobox): emit paste event
• See full diff in compare view

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