build(deps): bump operator-framework/opm in /operator/src/main/docker (#2582)

Bumps operator-framework/opm from v1.67.0 to v1.68.0.

---
updated-dependencies:
- dependency-name: operator-framework/opm
  dependency-version: v1.68.0
  dependency-type: direct:production
...

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Author: dependabot[bot]

operator/src/main/docker/catalog.Dockerfile

@@ -1,6 +1,6 @@
 # The base image is expected to contain
 # /bin/opm (with a serve subcommand) and /bin/grpc_health_probe
-FROM quay.io/operator-framework/opm:v1.67.0
+FROM quay.io/operator-framework/opm:v1.68.0
 
 # Configure the entrypoint and command
 ENTRYPOINT ["/bin/opm"]