chore(deps): bump envoyproxy/envoy (#3546)

Bumps the src-frontend-proxy group with 1 update in the /src/frontend-proxy directory: envoyproxy/envoy.


Updates `envoyproxy/envoy` from v1.38.2 to v1.38.3

---
updated-dependencies:
- dependency-name: envoyproxy/envoy
  dependency-version: v1.38.3
  dependency-type: direct:production
  dependency-group: src-frontend-proxy
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Juliano Costa <julianocosta89@outlook.com>

Author: dependabot[bot]

src/frontend-proxy/Dockerfile

@@ -1,7 +1,7 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
-FROM envoyproxy/envoy:v1.38.2@sha256:af7c3dfdbe10de65cb2db5839ce1adf8904ee41c9d372076d62acab43af6ec41
+FROM envoyproxy/envoy:v1.38.3@sha256:5f7c43e1147412fdb3af578c651c67478a3df818eae89d2261e707e06c209cdb
 
 RUN apt-get update && \
     apt-get install -y gettext-base && \