build(deps): bump openpolicyagent/opa

Bumps the examples-ext-authz group in /ext_authz with 1 update: openpolicyagent/opa.


Updates `openpolicyagent/opa` from 0.67.0-istio to 0.67.1-istio

---
updated-dependencies:
- dependency-name: openpolicyagent/opa
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: examples-ext-authz
...

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

ext_authz/Dockerfile-opa

@@ -1,3 +1,3 @@
-FROM openpolicyagent/opa:0.67.0-istio@sha256:41512cb576ba71c2a7267a64958f9f866d549fd681792eac1679cccd3f8b0276
+FROM openpolicyagent/opa:0.67.1-istio@sha256:23c4493ebc01940586addcaef94ef85bfbc12acd60f7a8ab484a1a7ba2e5c3dd
 
 COPY --chmod=644 ./config/opa-service/policy.rego /etc/policy.rego