WORKSPACE: set minimum bazel version to 7.2.1

Change-Id: I73f7cc8b279ada1e8e3405cc9390f5c211bd8129
Reviewed-on: https://review.monogon.dev/c/monogon/+/3283
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/WORKSPACE b/WORKSPACE
index a209b58..9e374ba 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 # Assert minimum Bazel version
 load("@bazel_skylib//lib:versions.bzl", "versions")
 
-versions.check(minimum_bazel_version = "7.0.0")
+versions.check(minimum_bazel_version = "7.2.1")
 
 # third_party external repositories
 load("//third_party/linux:external.bzl", "linux_external")