Bump Npgsql from 9.0.3 to 9.0.4

---
updated-dependencies:
- dependency-name: Npgsql
  dependency-version: 9.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/CodeScanningDemo/CodeScanningDemo.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Npgsql" Version="9.0.3" />
+    <PackageReference Include="Npgsql" Version="9.0.4" />
   </ItemGroup>
 
 </Project>