Update 9.0.303.md (#9983)

Author: victorisr

release-notes/9.0/9.0.7/9.0.303.md

@@ -1,5 +1,10 @@
 # .NET 9.0.303 - July 17, 2025
 
+Today, we are releasing .NET 9.0.303, an update to .NET 9.0.302 SDK which contains the following fixes:
+
+ 1. [Compiling with instrumentation does not generate unique coverage array per method](https://github.com/dotnet/roslyn/issues/78640).
+ 2. [Fix corruption of sliding text window when trying to peek backwards.](https://github.com/dotnet/roslyn/pull/79266).
+
 The .NET 9.0.303 release is available for download. This SDK includes the  released .NET 9.0.7 Runtime and is in support of Visual Studio 17.14 release. The latest 9.0 release is always listed at [.NET 9.0 Releases](../README.md).
 
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