Warning should specify to await handle_async

[tonybaloney]

Matches the second warning.

[codecov]

Codecov Report

Merging #151 (43e1e8d) into dev (f17030b) will decrease coverage by 0.45%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #151      +/-   ##
==========================================
- Coverage   90.15%   89.69%   -0.46%     
==========================================
  Files          50       50              
  Lines        2996     2921      -75     
  Branches      399      399              
==========================================
- Hits         2701     2620      -81     
- Misses        219      223       +4     
- Partials       76       78       +2     

Flag	Coverage Δ
unittests	89.69% <100.00%> (-0.43%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
azure/functions/_http_asgi.py	92.30% <100.00%> (ø)
azure/functions/http.py	76.31% <0.00%> (-7.90%)	⬇️
azure/functions/extension/app_extension_base.py	80.00% <0.00%> (-1.82%)	⬇️
azure/functions/durable_functions.py	85.00% <0.00%> (-1.37%)	⬇️
azure/functions/_http.py	92.30% <0.00%> (-0.74%)	⬇️
azure/functions/_abc.py	75.26% <0.00%> (-0.51%)	⬇️
azure/functions/queue.py	94.91% <0.00%> (-0.33%)	⬇️
azure/functions/decorators/core.py	98.38% <0.00%> (-0.23%)	⬇️
azure/functions/extension/extension_meta.py	95.94% <0.00%> (-0.16%)	⬇️
azure/functions/meta.py	77.29% <0.00%> (-0.13%)	⬇️
... and 5 more

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