build(deps): bump nginx

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


Updates `nginx` from `81dbf3e` to `98f8ec7`

---
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@sha256:98f8ec75657d21b924fe4f69b6b9bff2f6550ea48838af479d8894a852000e40