Fix input mask example in docs (#2318)

Co-authored-by: Paweł Kuna <[email protected]>

.changeset/dry-spiders-double.md

@@ -0,0 +1,5 @@
+---
+"@tabler/docs": patch
+---
+
+Fix input mask example in docs

docs/content/ui/forms/form-input-mask.md

@@ -2,6 +2,7 @@
 title: Input mask
 summary: An input mask is used to clarify the input format required in a given field and is helpful for users, removing confusion and reducing the number of validation errors.
 description: Clarify input formats for users.
+docs-libs: imask
 ---
 
 ## Installation