fix: Update busy box image for download pod (#1897)

# Description

Update image of busybox pod used for capture download.
Testing steps
- Create kind cluster
- Install gatekeeper for policy inforcemente
- Apply constraint that denies
- Download a capture with the busybox docker image - check that it fails
- Download a capture with the busybox mcr image - downloads without
issues
- Followed the same steps for an aks cluster and the mcr busybox as a
sanity check

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documentation](https://retina.sh/docs/Contributing/overview).
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- [ ] I have correctly attributed the author(s) of the code.
- [x] I have tested the changes locally.
- [ ] I have followed the project's style guidelines.
- [ ] I have updated the documentation, if necessary.
- [ ] I have added tests, if applicable.

## Screenshots (if applicable) or Testing Completed

Please add any relevant screenshots or GIFs to showcase the changes
made.

## Additional Notes

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---

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Author: carlotaarvela

cli/cmd/capture/download.go

@@ -172,7 +172,7 @@ func createDownloadPod(ctx context.Context, kubeClient *kubernetes.Clientset, na
 			Containers: []corev1.Container{
 				{
 					Name:    "download",
-					Image:   "busybox",
+					Image:   "mcr.microsoft.com/azurelinux/busybox:1.36",
 					Command: []string{"sh", "-c", "echo 'Download pod ready'; sleep 3600"},
 					VolumeMounts: []corev1.VolumeMount{
 						{