fix: correct user-invokable typo to user-invocable in all skill files

Co-authored-by: zdrawku <11193764+zdrawku@users.noreply.github.com>

Author: Copilot

skills/igniteui-angular-components/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: igniteui-angular-components
 description: "Provides guidance on all non-grid Ignite UI for Angular UI components including application setup and architecture, form controls (Input Group, Combo, Select, Date/Time Pickers, Calendar, Checkbox, Radio, Switch, Slider, reactive forms), layout (Tabs, Bottom Navigation, Stepper, Accordion, Splitter, Navigation Drawer, Layout Manager), data display (List, Tree, Card, Chips, Avatar, Badge, Icon, Carousel, Paginator, Progress Bar, Linear Progress Bar, Circular Progress Bar, Chat), feedback/overlays (Dialog, Snackbar, Toast, Banner), directives (Button, Ripple, Tooltip, Drag and Drop), Dock Manager, and Charts (Area Chart, Bar Chart, Column Chart, Stock/Financial Chart, Pie Chart, IgxCategoryChart, IgxFinancialChart, IgxDataChart, IgxPieChart). Use when users ask about any Ignite UI Angular component that is not a data grid, such as forms, inputs, dropdowns, date pickers, dialogs, navigation, lists, trees, cards, charts, or application scaffolding and setup."
-user_invokable: true
+user-invocable: true
 ---
 
 # Ignite UI for Angular — UI Components

skills/igniteui-angular-grids/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: igniteui-angular-grids
 description: "Provides guidance on all Ignite UI for Angular data grid types (Flat Grid, Tree Grid, Hierarchical Grid, Grid Lite, Pivot Grid) including setup, column configuration, sorting, filtering, selection, editing, grouping, summaries, toolbar, export, paging, remote data, and state persistence. Use when users ask about grids, tables, data grids, tabular data display, cell editing, batch editing, row selection, column pinning, column hiding, grouping rows, pivot tables, tree-structured data, hierarchical data, master-detail views, or exporting grid data."
-user_invokable: true
+user-invocable: true
 ---
 
 # Ignite UI for Angular — Data Grids

skills/igniteui-angular-theming/SKILL.md

@@ -1,7 +1,7 @@
 ---
 name: igniteui-angular-theming
 description: "Generates and customizes Ignite UI for Angular themes including color palettes, typography, elevations, and component-level styles using the Sass theming system and the igniteui-theming MCP server. Use when users ask to theme, restyle, or style Ignite UI components, change colors or the color palette, switch between light and dark themes, create or apply a global theme, customize typography or elevation shadows, adjust spacing, sizing, or roundness, or configure per-component design tokens."
-user_invokable: true
+user-invocable: true
 ---
 
 # Ignite UI for Angular — Theming Skill