build(deps): bump integrations/github in /infrastructure/repository

Bumps [integrations/github](https://github.com/integrations/terraform-provider-github) from 5.8.0 to 5.18.0.
- [Release notes](https://github.com/integrations/terraform-provider-github/releases)
- [Changelog](https://github.com/integrations/terraform-provider-github/blob/main/CHANGELOG.md)
- [Commits](integrations/terraform-provider-github@v5.8.0...v5.18.0)

---
updated-dependencies:
- dependency-name: integrations/github
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

infrastructure/repository/main.tf

@@ -10,7 +10,7 @@ terraform {
   required_providers {
     github = {
       source  = "integrations/github"
-      version = "5.8.0"
+      version = "5.18.0"
     }
   }