chore: Add math/rand to depguard rules.

Signed-off-by: Erik Westra <e.s.westra.95@gmail.com>

.golangci.yml

@@ -110,6 +110,8 @@ linters-settings:
             desc: "Use 'errors' or 'fmt' instead of github.com/pkg/errors"
           - pkg: github.com/hashicorp/go-multierror
             desc: "Use go.uber.org/multierr instead of github.com/hashicorp/go-multierror"
+          - pkg: math/rand
+            desc: "Use the newer 'math/rand/v2' instead of math/rand"
         # Add a different guard rule so that we can ignore tests.
       ignore-in-test:
           deny: