chore(deps): update terraform grafana to v3.18.3

[timtor-bot]

This PR contains the following updates:

Package	Type	Update	Change
grafana (source)	required_provider	patch	3.18.2 -> 3.18.3

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Release Notes

grafana/terraform-provider-grafana (grafana)

v3.18.3

Compare Source

What's Changed

• Fix unhandled values in Cloud Provider resources by @​thepalbi in https://github.com/grafana/terraform-provider-grafana/pull/2015
• Add support for additional tags by @​andriikushch in https://github.com/grafana/terraform-provider-grafana/pull/2009
• Add color option in contact points for Alerting by @​wymangr in https://github.com/grafana/terraform-provider-grafana/pull/2010

Full Changelog: grafana/terraform-provider-grafana@v3.18.2...v3.18.3

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