osbase/build: replace label_keyed_string_dict with string_keyed_label_dict

Before bazel 7.4 the string_keyed_label_dict attribute type wasn't available. fsspec_core_impl was using a label_keyed_string_dict which is structurally wrong but there was no alternative for it. This replaces that usage.

Change-Id: I36c02c84e6aa2557cd2beb09c07d3ceca501553d
Reviewed-on: https://review.monogon.dev/c/monogon/+/3853
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Jenkins CI
diff --git a/osbase/fsquota/BUILD.bazel b/osbase/fsquota/BUILD.bazel
index 75a3133..0293e25 100644
--- a/osbase/fsquota/BUILD.bazel
+++ b/osbase/fsquota/BUILD.bazel
@@ -27,7 +27,7 @@
     name = "ktest",
     cmdline = "ramdisk_size=51200",
     files_cc = {
-        "@xfsprogs//:mkfs": "/mkfs.xfs",
+        "/mkfs.xfs": "@xfsprogs//:mkfs",
     },
     tester = ":fsquota_test",
 )