chore(perf): bump version to 9.0.40 to match MAUI 9.0.40

Update version from 9.0.0 to 9.0.40 to align precisely with MAUI 9.0.40 release. Update CHANGELOG, package metadata, and templates. Fix thread safety issue in FontFallbackManager by changing _glyphCache from Dictionary to ConcurrentDictionary to prevent race conditions during concurrent glyph lookups.

CHANGELOG.md

@@ -4,9 +4,9 @@ All notable changes to this project will be documented in this file.
 
 Version numbers are aligned with .NET / MAUI versions (e.g., OpenMaui 9.0.x targets .NET 9 / MAUI 9).
 
-## [9.0.0] - 2026-03-06
+## [9.0.40] - 2026-03-07
 
-> Version realigned from 1.0.0 to match .NET 9 / MAUI 9.0.x versioning.
+> Version aligned with MAUI 9.0.40. Previously released as 1.0.0.
 
 ### Added
 - 35+ Skia-rendered controls: Button, Label, Entry, Editor, CheckBox, Switch, RadioButton, Slider, Stepper, Picker, DatePicker, TimePicker, SearchBar, Image, ImageButton, ProgressBar, ActivityIndicator, BoxView, Border, Frame, ScrollView, CollectionView, CarouselView, IndicatorView, SwipeView, RefreshView, GraphicsView, WebView, MenuBar
@@ -42,7 +42,7 @@ Version numbers are aligned with .NET / MAUI versions (e.g., OpenMaui 9.0.x targ
 
 ## [1.0.0] - 2026-03-06 [DEPRECATED]
 
-> Superseded by 9.0.0. Identical codebase, version renumbered to align with .NET/MAUI versioning.
+> Superseded by 9.0.40. Identical codebase, version renumbered to align with MAUI versioning.
 
 ## [1.0.0-rc.1] - 2026-02-01