docs: fix typo "wont" -> "won't" in reactivity guide

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Fixed parsing Kitty extended keys with multiple codepoints https://github.com/Textualize/textual/pull/6592
 - Fixed crash when clicking in the Screen's padding https://github.com/Textualize/textual/pull/6598
+- Fixed typo ("wont" → "won't") in reactivity guide docs
 
 ### Changed
 

docs/guide/reactivity.md

@@ -94,7 +94,7 @@ The `Name` widget has a reactive `who` attribute. When the app modifies that att
 
 !!! information
 
-    Textual will check if a value has really changed, so assigning the same value wont prompt an unnecessary refresh.
+    Textual will check if a value has really changed, so assigning the same value won't prompt an unnecessary refresh.
 
 ### Disabling refresh
 
@@ -107,7 +107,7 @@ class MyWidget(Widget):
     count = var(0)  # (1)!
 ```
 
-1. Changing `self.count` wont cause a refresh or layout.
+1. Changing `self.count` won't cause a refresh or layout.
 
 ### Layout