Bump Npgsql from 5.0.2 to 5.0.3

Bumps [Npgsql](https://github.com/npgsql/npgsql) from 5.0.2 to 5.0.3.
- [Release notes](https://github.com/npgsql/npgsql/releases)
- [Commits](https://github.com/npgsql/npgsql/compare/v5.0.2...v5.0.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

OhmGraphite/OhmGraphite.csproj

@@ -30,7 +30,7 @@
   <ItemGroup>
     <PackageReference Include="Costura.Fody" Version="3.3.2" />
     <PackageReference Include="NLog.Config" Version="4.7.7" />
-    <PackageReference Include="Npgsql" Version="5.0.2" />
+    <PackageReference Include="Npgsql" Version="5.0.3" />
     <PackageReference Include="prometheus-net" Version="4.1.1" />
     <PackageReference Include="Resourcer.Fody" Version="1.7.3" />
     <PackageReference Include="TopShelf" Version="4.2.1" />