renovatebot(deps): update apereo/cas docker tag to v7.1.4

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| apereo/cas | patch | `7.1.3` -> `7.1.4` |

---

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

---

### Configuration

📅 **Schedule**: Branch creation - "after 10pm every weekday,before 6am every weekday" (UTC), Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Never, 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/apereo/cas).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xMjUuMSIsInVwZGF0ZWRJblZlciI6IjM5LjEyNS4xIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbIkJvdCIsIlJlbm92YXRlIl19-->

ci/tests/cas/run-cas-server.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-export DOCKER_IMAGE="apereo/cas:7.1.3"
+export DOCKER_IMAGE="apereo/cas:7.1.4"
 
 if [[ -f "${CAS_KEYSTORE}" ]] ; then
   echo -e "Found existing CAS keystore at ${CAS_KEYSTORE}"