WORKSPACE: bump bazel to 7.0.0

Change-Id: Ic074b7b83f229e3c7f6ace7fdb46d33e5bd7c37b
Reviewed-on: https://review.monogon.dev/c/monogon/+/2708
Reviewed-by: Serge Bazanski <serge@monogon.tech>
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/third_party/nix/env.nix b/third_party/nix/env.nix
index 2af72ff..6dcd6f8 100644
--- a/third_party/nix/env.nix
+++ b/third_party/nix/env.nix
@@ -40,8 +40,8 @@
     (stdenv.mkDerivation {
       name = "bazel";
       src = builtins.fetchurl {
-        url = "https://github.com/bazelbuild/bazel/releases/download/6.4.0/bazel-6.4.0-linux-x86_64";
-        sha256 = "11md3cm9pb1449c3i89xy474v1lmzng5vbw6nhbigqx6xxqg7r3r";
+        url = "https://github.com/bazelbuild/bazel/releases/download/7.0.0/bazel-7.0.0-linux-x86_64";
+        sha256 = "0vnlpfwq1nnigscybwc7cxd9n14zrcsk7jzrrc66wwzr882zf94b";
       };
       unpackPhase = ''
         true