[release/8.0-staging] Update SystemDataSqlClientVersion from 4.8.5 -> 4.8.6

[github-actions]

Backport of #97430 to release/8.0-staging

/cc @ericstj @LoopedBard3

Test only change. SqlClient is used in our tests of System.Data.Common.

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Issue Details

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Backport of #97430 to release/8.0-staging

/cc @ericstj @LoopedBard3

Customer Impact

• Customer reported
• Found internally

[Select one or both of the boxes. Describe how this issue impacts customers, citing the expected and actual behaviors and scope of the issue. If customer-reported, provide the issue number.]

Regression

• Yes
• No

[If yes, specify when the regression was introduced. Provide the PR or commit if known.]

Testing

[How was the fix verified? How was the issue missed previously? What tests were added?]

Risk

[High/Medium/Low. Justify the indication by mentioning how risks were measured and addressed.]

IMPORTANT: If this backport is for a servicing release, please verify that:

• The PR target branch is release/X.0-staging, not release/X.0.

• If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.

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