glab variable export does not output clean data on stdout

When using glab variable export -F json (the default), the output sent over stdout is not a valid json document as it is prefixed with "Exporting variables from the project/path project:":

Exporting variables from the bauwatch/infrastructure/terraform project:
[
  {
    "key": "...",
    "value": "...",
    "variable_type": "file",
    "protected": false,
    "masked": false,
    "hidden": false,
    "raw": true,
    "environment_scope": "*",
    "description": "..."
  },
  ...
]

This causes tools like jq to fail to parse.

Steps to reproduce:

Inside a GitLab cloned project, run:

glab variable export -F json | jq .

This results in:

jq: parse error: Invalid numeric literal at line 1, column 10

Expected result

jq is able to parse the output, and presents it in a formatted way and allows filtering.