update libg

[aparajit-pratap]

Purpose

Cherry-pick: #13597

Update libg. Includes:

NURBS curve approximation fixes
Localization support for obsolete node warnings
Fixes to PolyCurve Normal

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

NURBS curve approximation fixes
Localization support for obsolete node warnings
Fixes to PolyCurve Normal

FYIs

(FILL ME IN, Optional) Names of anyone else you wish to be notified of

[aparajit-pratap]

One unrelated test failing, most likely flaky: https://master-5.jenkins.autodesk.com/job/Dynamo/job/DynamoSelfServe/job/pullRequestValidation/7856/