Bump chainguard-dev/oci from 0.0.20 to 0.0.21

Bumps [chainguard-dev/oci](https://github.com/chainguard-dev/terraform-provider-oci) from 0.0.20 to 0.0.21.
- [Release notes](https://github.com/chainguard-dev/terraform-provider-oci/releases)
- [Changelog](https://github.com/chainguard-dev/terraform-provider-oci/blob/main/.goreleaser.yml)
- [Commits](chainguard-dev/terraform-provider-oci@v0.0.20...v0.0.21)

---
updated-dependencies:
- dependency-name: chainguard-dev/oci
  dependency-version: 0.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

main.tf

@@ -10,7 +10,7 @@ terraform {
     }
     oci = {
       source  = "chainguard-dev/oci"
-      version = "0.0.20"
+      version = "0.0.21"
     }
   }