docs: Fix docs in docs/architecture.md
Correct the docs in docs/architecture.md,
use virtio-fs as the default config.
Fixes:
@@ -58,7 +58,7 @@ to go through the VSOCK interface exported by QEMU.
The container workload, that is, the actual OCI bundle rootfs, is exported from the
host to the virtual machine. In the case where a block-based graph driver is
-configured, `virtio-scsi` will be used. In all other cases a 9pfs VIRTIO mount point
+configured, `virtio-scsi` will be used. In all other cases a `virtio-fs` VIRTIO mount point
will be used. `kata-agent` uses this mount point as the root filesystem for the
container processes.
