fix: use updated k3s (#426)

## Description
Testing CI with upgraded k3s

## Related Issue

Fixes #253

## Type of change

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

## Checklist before merging

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

tasks.yaml

@@ -5,7 +5,7 @@ variables:
   - name: PKG
 
   - name: K3D_IMAGE
-    default: "ghcr.io/defenseunicorns/oss/uds-k3d-k3s:v1.28.7-k3s1"
+    default: "ghcr.io/defenseunicorns/oss/uds-k3d-k3s:v1.29.4-k3s1"
 
 includes:
   - create: ./tasks/create.yaml