Update prom/prometheus Docker tag to v3.4.2 (#41025)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| prom/prometheus | patch | `v3.4.1` -> `v3.4.2` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Configuration

📅 **Schedule**: Branch creation - "on tuesday" (UTC), Automerge - At any
time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/open-telemetry/opentelemetry-collector-contrib).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MC42Mi4xIiwidXBkYXRlZEluVmVyIjoiNDAuNjIuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiZGVwZW5kZW5jaWVzIiwicmVub3ZhdGVib3QiXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/couchbase/docker-compose.yaml

@@ -17,7 +17,7 @@ services:
     depends_on:
       - couchbase
   prometheus:
-    image: prom/prometheus:v3.4.1
+    image: prom/prometheus:v3.4.2
     volumes:
       - ./prometheus-config.yaml:/etc/prometheus/prometheus.yml
     ports: