eolebase: 1Go of RAM is too limited to deploy k3d

The limited amount of RAM require the qemu virtual machine to swap a lot and slow down the installation.

It may make the installation fail with timeout:

==> eolebase.qemu.ubuntu: ERRO[0135] Failed Cluster Start: Failed to start server k3d-eole3-server-2: Node k3d-eole3-server-2 failed to get ready: error waiting for log line `k3s is up and running` from node 'k3d-eole3-server-2': stopped returning log lines
==> eolebase.qemu.ubuntu: ERRO[0135] Failed to create cluster >>> Rolling Back
    eolebase.qemu.ubuntu: INFO[0135] Deleting cluster 'eole3'
    eolebase.qemu.ubuntu: INFO[0140] Deleting cluster network 'k3d-eole3'
    eolebase.qemu.ubuntu: INFO[0140] Deleting image volume 'k3d-eole3-images'
==> eolebase.qemu.ubuntu: FATA[0140] Cluster creation FAILED, all changes have been rolled back!