build(deps): bump nginx

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


Updates `nginx` from `f1f025c` to `ed6d2c4`

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

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

examples/local_ratelimit/Dockerfile-nginx

@@ -1 +1 @@
-FROM nginx@sha256:f1f025c6b59fd95ea9423beb3b2a068f0e806a590250c88db74fdc3085252450
+FROM nginx@sha256:ed6d2c43c8fbcd3eaa44c9dab6d94cb346234476230dc1681227aa72d07181ee