MINOR: [C#] Bump coverlet.collector from 6.0.2 to 6.0.3 in /csharp#45179

CurtHagenlocher merged 1 commit intomainapache/arrow:mainfrom

dependabot/nuget/csharp/coverlet.collector-6.0.3apache/arrow:dependabot/nuget/csharp/coverlet.collector-6.0.3Copy head branch name to clipboard