Bumping `sprig` to `v3.2.3` to fix kebabcase bug

[yhakbar]

Description

Fixes #155.

Bumps sprig to v3.2.3 to fix kebabcase bug, as the release addresses the double dash that can occur when numbers and letters are combined together in kebabcase usage.

See: https://github.com/Masterminds/sprig/pull/348

TODOs

Read the Gruntwork contribution guidelines.

• [x] Update the docs.
• [x] Run the relevant tests successfully, including pre-commit checks.
• [x] Ensure any 3rd party code adheres with our license policy or delete this line if its not applicable.
• [x] Include release notes. If this PR is backward incompatible, include a migration guide.

Release Notes (draft)

Updated sprig to v3.2.3. Fixes bug with kebabcase introducing an extra dash.