Update Datadog SDK snapshot version used to 3.2.0-SNAPSHOT

[0xnm]

What does this PR do?

Snapshot version is used in instrumented tests.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.29%. Comparing base (f9ac810) to head (b841d66).

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #447   +/-   ##
==========================================
  Coverage      76.29%   76.29%           
  Complexity       284      284           
==========================================
  Files             35       35           
  Lines           1063     1063           
  Branches         130      130           
==========================================
  Hits             811      811           
  Misses           194      194           
  Partials          58       58           

see 2 files with indirect coverage changes

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