build(deps): bump fsouza/fake-gcs-server in /docker (#6763)

Bumps fsouza/fake-gcs-server from 1.50.0 to 1.50.2.

---
updated-dependencies:
- dependency-name: fsouza/fake-gcs-server
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docker/Dockerfile.gcs-emulator

@@ -1,4 +1,4 @@
-FROM fsouza/fake-gcs-server:1.50.0@sha256:bbea444359889348a443082d7cf709d7a59bdc3c7b5df7fefdda72b4b991e25f
+FROM fsouza/fake-gcs-server:1.50.2@sha256:23996047676fe5312001b828d800670519181c57a5943c2270e7421f3ab3f477
 
 # add curl for use in healthcheck
 RUN apk add --no-cache curl