build(deps): bump nginx

Bumps the examples-local-ratelimit group with 1 update in the /local_ratelimit directory: nginx.


Updates `nginx` from `81dbf3e` to `447a866`

---
updated-dependencies:
- dependency-name: nginx
  dependency-type: direct:production
  dependency-group: examples-local-ratelimit
...

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

local_ratelimit/Dockerfile-nginx

@@ -1 +1 @@
-FROM nginx@sha256:81dbf3ecf1120d90ace4593096bb650a2d11d4a11d24c3aaea5bef7c9bbb2c88
+FROM nginx@sha256:447a8665cc1dab95b1ca778e162215839ccbb9189104c79d7ec3a81e14577add