[release/7.0] Bump Kerberos.NET version in tests

[github-actions]

Backport of #74554 to release/7.0

/cc @wfurt @filipnavara

Customer Impact

test only change to stabilize CI runs.
fixes #73343

Testing

Risk

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

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Issue Details

---

Backport of #74554 to release/7.0

/cc @wfurt @filipnavara

Customer Impact

Testing

Risk

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

Author:	github-actions[bot]
Assignees:	-
Labels:	area-System.Net.Security
Milestone:	-

[carlossanlop]

Test only change. Approved.
Will merge when the CI finishes.

[carlossanlop]

CI failures are unrelated:

• One is in System.Data.OleDb.Tests: System.Data.OleDb.Test - timeout and hangs #74488

• The other one is an infra outage:

/Users/runner/work/1/s/artifacts/toolset/restore.proj : error :
Unable to load the service index for source
https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json.