Update 07-09-july-security-and-quality-rollup.md (dotnet#41738)

The winforms fix was shipped only on 4.8 and 4.8.1 versions of the Framework. Correcting that.

Author: Tanya-Solyanik

docs/framework/release-notes/2024/07-09-july-security-and-quality-rollup.md

@@ -28,7 +28,7 @@ Addresses an issue with x509 certificate use under PPL in Azure AD. (*Applies to
 
 #### Winforms
 
-Addresses an issue with the size of memory leaks associated with AccessibleObjects held in memory due to ref-counting. (*Applies to: .NET Framework 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1.*)
+Addresses an issue with the size of memory leaks associated with AccessibleObjects held in memory due to ref-counting. (*Applies to: .NET Framework 4.8, 4.8.1.*)
 
 ## Known issues