update mapbox gl draw example

[andrewharvey]

Launch Checklist

As raised via a comment in #5138, the mapbox-gl-draw example currently provides an example of using mapbox-gl-draw however the description mentioned maplibre-gl-draw.

This PR updates the description to match the example given.

We also update to mapbox-gl-draw 1.5.0 since from this version the CANVAS class is exposed which we need to override to match the maplibre class. This is necessary for the delete a vertex feature to work and possibly other features.

• Confirm your changes do not include backports from Mapbox projects (unless with compliant license) - if you are not sure about this, please ask!
• Briefly describe the changes in this PR.
• Add an entry to CHANGELOG.md under the ## main section.

Is this done for examples as well?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.95%. Comparing base (3f28408) to head (7f36c9f).
Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5393   +/-   ##
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  Coverage   91.95%   91.95%           
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  Files         282      282           
  Lines       38908    38908           
  Branches     6820     6827    +7     
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  Hits        35777    35777           
  Misses       3003     3003           
  Partials      128      128           

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[HarelM]

Thanks!
This will be available when the next release goes out.