test: fix sanity test pack format

BPR02 · BPR02 · commit 70161ec5164f · 2024-12-12T16:32:05.000-08:00
diff --git a/examples/sanity_test/beet.yaml b/examples/sanity_test/beet.yaml
@@ -1,5 +1,6 @@
 data_pack:
   load: src
+  pack_format: 57
   overlays:
     - formats:
         min_inclusive: 48
diff --git a/tests/snapshots/examples__build_sanity_test__0.pack.md b/tests/snapshots/examples__build_sanity_test__0.pack.md
@@ -7,7 +7,7 @@
 ```json
 {
   "pack": {
-    "pack_format": 48,
+    "pack_format": 57,
     "description": ""
   },
   "overlays": {
