fix logos names (#459)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Updated the application icon for the `vm-instance` application to
enhance visual representation.
  
- **Bug Fixes**
- Improved the execution of migration scripts by ensuring they have the
correct permissions before running.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/apps/vm-instance/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 #name: Virtual Machine
 name: vm-instance
 description: Virtual machine instance
-icon: /logos/vm.svg
+icon: /logos/vmi.svg
 
 # A chart can be either an 'application' or a 'library' chart.
 #

scripts/installer.sh

@@ -13,6 +13,7 @@ run_migrations() {
   current_version=$(kubectl get configmap -n cozy-system cozystack-version -o jsonpath='{.data.version}') || true
   until [ "$current_version" = "$VERSION" ]; do
     echo "run migration: $current_version --> $VERSION"
+    chmod +x scripts/migrations/$current_version
     scripts/migrations/$current_version
     current_version=$(kubectl get configmap -n cozy-system cozystack-version -o jsonpath='{.data.version}')
   done