Fix link to 1.0.0 in CHANGELOG

Author: aaron-lane

CHANGELOG.md

@@ -86,8 +86,8 @@ and this project adheres to [Semantic Versioning][semver-site].
 - Subnets within the VPC
 - Secondary ranges for the subnets (if applicable)
 
-[Unreleased]: https://github.com/terraform-google-modules/terraform-google-network/compare/v2.0.0...HEAD
-[2.0.0]: https://github.com/terraform-google-modules/terraform-google-network/compare/v0.8.0...v2.0.0
+[Unreleased]: https://github.com/terraform-google-modules/terraform-google-network/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/terraform-google-modules/terraform-google-network/compare/v0.8.0...v1.0.0
 [0.8.0]: https://github.com/terraform-google-modules/terraform-google-network/compare/v0.7.0...v0.8.0
 [0.7.0]: https://github.com/terraform-google-modules/terraform-google-network/compare/v0.6.0...v0.7.0
 [0.6.0]: https://github.com/terraform-google-modules/terraform-google-network/compare/v0.5.0...v0.6.0