Update dependency dotnet-reportgenerator-globaltool to 5.4.9

This MR contains the following updates:

Package	Change	Age	Confidence
dotnet-reportgenerator-globaltool	5.4.8 -> 5.4.9

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Release Notes

danielpalme/ReportGenerator (dotnet-reportgenerator-globaltool)

v5.4.9: ReportGenerator_5.4.9

Changes:

• #​744: Azure DevOps task: Added support for nodeJS 20

This release requires .NET Framework 4.7 or .NET 8.0/9.0

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