Fix IronBank hardening_manifest CI test (elastic#124579) (elastic#124589)

This commit fix the IronBank hardening_manifest CI test that expect the
hardening_manifest.yaml values to match `'^(?!\\s*$)[ -~|]*$'` regex:

```
| hardening_manifest           | ERROR    | Hardening Manifest failed jsonschema validation
| hardening_manifest           | ERROR    | Verify Hardening Manifest content
| hardening_manifest           | ERROR    | 'Rene Gröschke' does not match '^(?!\\s*$)[ -~|]*$'
```

https://repo1.dso.mil/dsop/elastic/elasticsearch/elasticsearch9/-/jobs/43219286

cc @breskeby

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(cherry picked from commit e5cf597)

# Conflicts:
#	distribution/docker/src/docker/iron_bank/hardening_manifest.yaml

Co-authored-by: Julien Mailleret <[email protected]>

Author: breskeby

distribution/docker/src/docker/iron_bank/hardening_manifest.yaml

@@ -44,9 +44,12 @@ resources:
       value: "93dcc18adc78c65a028a84799ecf8ad40c936fdfc5f2a57b1acda5a8117fa82c"
 # List of project maintainers
 maintainers:
-  - name: "Rory Hunter"
-    email: "[email protected]"
-    username: "rory"
+  - name: "Mark Vieira"
+    email: "[email protected]"
+    username: "mark-vieira"
+  - name: "Rene Groeschke"
+    email: "[email protected]"
+    username: "breskeby"
   - email: "[email protected]"
     name: "Alexander Klepal"
     username: "alexander.klepal"