Bump integrations/github from 5.43.0 to 6.7.3

Bumps [integrations/github](https://github.com/integrations/terraform-provider-github) from 5.43.0 to 6.7.3.
- [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@v5.43.0...v6.7.3)

---
updated-dependencies:
- dependency-name: integrations/github
  dependency-version: 6.7.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

main.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     github = {
       source  = "integrations/github"
-      version = "5.43.0"
+      version = "6.7.3"
     }
   }
 }