Swap pi5 and pi6 and make everything start again

The 1280x720 image was reserving 1920x1080 of space

Change-Id: I5b70653a875fe874406458832c4fbfc4dc0a3e3d
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/y2023/y2023_imu.json b/y2023/y2023_imu.json
index 6940479..b521e07 100644
--- a/y2023/y2023_imu.json
+++ b/y2023/y2023_imu.json
@@ -392,12 +392,12 @@
   "nodes": [
     {
       "name": "imu",
-      "hostname": "imu",
+      "hostname": "pi6",
       "hostnames": [
-        "pi-971-5",
-        "pi-7971-5",
-        "pi-8971-5",
-        "pi-9971-5"
+        "pi-971-6",
+        "pi-7971-6",
+        "pi-8971-6",
+        "pi-9971-6"
       ],
       "port": 9971
     },