micromamba autocomplete does not work

Checks

• I have searched github.com/withfig/fig/issues and there are no duplicates of my issue
• I have run fig doctor in the affected terminal session
• I have run fig restart and replicated the issue again

Operating system

macOS 13.2.1 (22D68)

Expected behaviour

When I type micromamba I expected fig to provide autocompletion.

Actual behaviour

The micromamba command is not showing any autocompletions. Previously when using Miniconda, the conda command did provide autocomplete suggestions.

Steps to reproduce

• Install micromamba according to your architecture. I installed with brew install mamba
• Activate shell completion with micromamba shell completion
• Open new terminal and start typing micromamba notice no autocompletion suggestions appear in Fig

Environment

fig-details:
  - 2.14.0-beta.7
hardware-info:
  - model: 
  - model-id: 
  - chip-id: Apple M1 Max
  - cores: 10
  - mem: 64.00 GB
os-info:
  - macOS 13.2.1 (22D68)
environment:
  - shell: /bin/zsh
  - terminal: iterm
  - cwd: /Users/simonmd
  - exe-path: /Users/simonmd/.fig/bin/fig
  - install-method: unknown
  - env-vars:
    - FIGTERM_SESSION_ID: 15eb193d-b006-48cc-8145-edb5e06fd46b
    - FIG_SET_PARENT_CHECK: 1
    - FIG_TERM: 2.14.0-beta.7
    - PATH: /Users/simonmd/.yarn/bin:/Users/simonmd/.config/yarn/global/node_modules/.bin:/Users/simonmd/.poetry/bin:/opt/homebrew/opt/libpq/bin:/opt/homebrew/opt/postgresql@13/bin:/Users/simonmd/micromamba/condabin:/Users/simonmd/.yarn/bin:/Users/simonmd/.config/yarn/global/node_modules/.bin:/Users/simonmd/.poetry/bin:/opt/homebrew/opt/libpq/bin:/opt/homebrew/opt/postgresql@13/bin:/Users/simonmd/.nvm/versions/node/v17.5.0/bin:/Users/simonmd/Library/Application Support/edgedb/bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/go/bin:/Library/Apple/usr/bin:/Users/simonmd/.fig/bin:/Users/simonmd/.local/bin
    - SHELL: /bin/zsh
    - TERM: xterm-256color
    - __CFBundleIdentifier: com.googlecode.iterm2
    - FIG_PID: 21981
    - FIG_SET_PARENT: 15eb193d-b006-48cc-8145-edb5e06fd46b