Bump ghcr.io/hspaans/devcontainer-features/django-upgrade

Bumps ghcr.io/hspaans/devcontainer-features/django-upgrade from 1.0.0 to 2.0.0.

---
updated-dependencies:
- dependency-name: ghcr.io/hspaans/devcontainer-features/django-upgrade
  dependency-version: 2.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.devcontainer/devcontainer.json

@@ -49,7 +49,7 @@
         "ghcr.io/devcontainers/features/sshd:1": {
             "version": "latest"
         },
-        "ghcr.io/hspaans/devcontainer-features/django-upgrade:1": {
+        "ghcr.io/hspaans/devcontainer-features/django-upgrade:2": {
             "version": "latest"
         },
         "ghcr.io/itsmechlark/features/redis-server:1": {