Bump upgrading AIO volume to 75 GB

Author: seunghun1ee

.github/workflows/stackhpc-all-in-one.yml

@@ -176,7 +176,7 @@ jobs:
           VM_NAME: "skc-ci-aio-${{ inputs.neutron_plugin }}-${{ github.run_id }}"
           VM_IMAGE: ${{ steps.image_name.outputs.image_name }}
           VM_INTERFACE: ${{ inputs.vm_interface }}
-          VM_VOLUME_SIZE: ${{ inputs.upgrade && '65' || '50' }}
+          VM_VOLUME_SIZE: ${{ inputs.upgrade && '75' || '50' }}
           VM_TAGS: '["skc-ci-aio", "PR=${{ github.event.number }}"]'
 
       - name: Terraform Plan