fix flaky test TestAccComputeInstanceSettings_update

[shuyama1]

Use a different zone than the one specified in TestAccComputeInstanceSettings_instanceSettingsBasicExample to avoid conflicts, as this is a singleton resource.

fixes hashicorp/terraform-provider-google#16741

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[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

google provider: Diff ( 1 file changed, 3 insertions(+), 3 deletions(-))
google-beta provider: Diff ( 1 file changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 1195
Passed tests: 1110
Skipped tests: 84
Affected tests: 1

Click here to see the affected service packages

• compute

Action taken

Found 1 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

• TestAccComputeInstanceSettings_update

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[modular-magician]

🟢 Tests passed during RECORDING mode:
TestAccComputeInstanceSettings_update [Debug log]

🟢 No issues found for passed tests after REPLAYING rerun.

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🟢 All tests passed!

View the build log or the debug log for each test