Backport of deps: update go-bexpr from 0.1.11 to 0.1.12 into release/1.4.x

[hc-github-team-nomad-core]

Backport

This PR is auto-generated from #16991 to be assessed for backporting due to the inclusion of the label backport/1.4.x.

The below text is copied from the body of the original PR.

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Pulls in hashicorp/go-bexpr#38

Fixes #16758

Without this fix in the bexpr the test fails with:

=== RUN   TestNode_List_PaginationFiltering/filter_on_meta_key
    node_endpoint_test.go:4420:
                Error Trace:    /home/schmichael/src/nomad/nomad/node_endpoint_test.go:4420
                Error:          Received unexpected error:
                                RPC Error:: 400,failed to read result page: error finding value in datum: /Meta/foo at part 1: couldn't find key "foo"
                Test:           TestNode_List_PaginationFiltering/filter_on_meta_key