chore: bump os-builder to v0.300.4 (#320)

Signed-off-by: Nianyu Shen <[email protected]>

Author: nianyush

Earthfile

@@ -26,7 +26,7 @@ ARG KAIROS_VERSION=v3.1.3
 ARG K3S_FLAVOR_TAG=k3s1
 ARG RKE2_FLAVOR_TAG=rke2r1
 ARG BASE_IMAGE_URL=quay.io/kairos
-ARG OSBUILDER_VERSION=v0.300.3
+ARG OSBUILDER_VERSION=v0.300.4
 ARG OSBUILDER_IMAGE=quay.io/kairos/osbuilder-tools:$OSBUILDER_VERSION
 ARG K3S_PROVIDER_VERSION=v4.5.1
 ARG KUBEADM_PROVIDER_VERSION=v4.5.3