chore(deps): update docker.io/library/nginx docker tag to v1.27 (open-telemetry#33359)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| docker.io/library/nginx | final | minor | `1.26` -> `1.27` |

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receiver/nginxreceiver/testdata/integration/Dockerfile.nginx

@@ -1,4 +1,4 @@
-FROM docker.io/library/nginx:1.26
+FROM docker.io/library/nginx:1.27
 
 COPY default.conf /etc/nginx/conf.d/default.conf
 RUN \