Removing version pinning for MS Graph PowerShell module dependency

[givinalis]

Changes

A much requested for change is to remove the pinning of Graph PowerShell from v2.25 to allow users to use the latest version of MS Graph installed in their environments.

[learn-build-service-prod]

Learn Build status updates of commit a5e27bc:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• Line 0, Column 0: [Error: PSMD2Yaml_FileLoadFailed] Failed to load file: C:/LocalRun/W/uu2k-s/module/mapping/monikerMapping.json. PackageRoot, ReferenceTocUrl, and ConceptualTocUrl are required for every moniker. PackageRoot should be a valid relative path to docset root.

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