chore: switch unicorn ztunnel to fips image (#1240)

## Description

Switches to the fips version of the cgr image (and latest/1.24.2).

## Related Issue

N/A

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Steps to Validate

I have mostly validate just by deploying core. May need further
validation of functionality (i.e. actual ambient workloads, waypoints,
L4/L7 policy, etc). From basic deployment testing it is
functional/deploys.

## Checklist before merging

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor
Guide](https://github.com/defenseunicorns/uds-template-capability/blob/main/CONTRIBUTING.md)
followed

src/istio/values/unicorn/ztunnel.yaml

@@ -1,4 +1,4 @@
 # Copyright 2024 Defense Unicorns
 # SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-Defense-Unicorns-Commercial
 
-image: cgr.dev/du-uds-defenseunicorns/ztunnel:1.24.1
+image: cgr.dev/du-uds-defenseunicorns/ztunnel-fips:1.24.2

src/istio/zarf.yaml

@@ -118,7 +118,7 @@ components:
           - "values/unicorn/ztunnel.yaml"
     images:
       - cgr.dev/du-uds-defenseunicorns/istio-install-cni:1.24.2
-      - cgr.dev/du-uds-defenseunicorns/ztunnel:1.24.1
+      - cgr.dev/du-uds-defenseunicorns/ztunnel-fips:1.24.2
 
   - name: istio-admin-gateway
     required: true