Update max threshold permitted in ServiceLevelObjectives

[etruong42]

https://cloud.google.com/monitoring/api/ref_v3/rest/v3/services.serviceLevelObjectives#resource:-servicelevelobjective indicate that the threshold can now be .9999

Fixes hashicorp/terraform-provider-google#18556

Release Note Template for Downstream PRs (will be copied)

monitoring: updated max threshold permitted in google_monitoring_slo to 0.9999

[github-actions]

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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, 2 insertions(+), 2 deletions(-))
google-beta provider: Diff ( 1 file changed, 2 insertions(+), 2 deletions(-))
terraform-google-conversion: Diff ( 1 file changed, 2 insertions(+), 2 deletions(-))

[modular-magician]

Tests analytics

Total tests: 56
Passed tests: 53
Skipped tests: 3
Affected tests: 0

Click here to see the affected service packages

• monitoring

$\textcolor{green}{\textsf{All tests passed!}}$

View the build log

[etruong42]

Fixes hashicorp/terraform-provider-google#18556