Bug fix for "Use extracted partitions for x86_64"

Bug: 358426674
Change-Id: Ieb0c275b081f16ff889b572a1f7add66e01abf10
Test: build
diff --git a/build/debian/vm_config.json.x86_64 b/build/debian/vm_config.json.x86_64
index 4d31105..496e684 100644
--- a/build/debian/vm_config.json.x86_64
+++ b/build/debian/vm_config.json.x86_64
@@ -13,7 +13,7 @@
                     "label": "BIOS",
                     "path": "$PAYLOAD_DIR/bios_part",
                     "writable": true,
-                    "guid": "{root_part_guid}"
+                    "guid": "{bios_part_guid}"
                 },
                 {
                     "label": "EFI",