Fix devcontainer Dockerfile for arm

[jackgerrits]

Why are these changes needed?

Resolves a build isssue when building this on an arm device

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.03%. Comparing base (f3289cb) to head (95bc4c9).
Report is 1482 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1866   +/-   ##
=======================================
  Coverage   36.03%   36.03%           
=======================================
  Files          63       63           
  Lines        6618     6618           
  Branches     1459     1459           
=======================================
  Hits         2385     2385           
  Misses       4039     4039           
  Partials      194      194           

Flag	Coverage Δ
unittests	36.03% <ø> (ø)

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[qingyun-wu]

LGTM!