build(deps): bump third_party/sby from `fa5d5ad` to `83a1aa2`

[dependabot[bot]]

Bumps third_party/sby from fa5d5ad to 83a1aa2.

Commits

• 83a1aa2 Merge pull request #218 from jix/fix_engine_list
• a0e3dd3 Fix engine_list's return value
• e97dd01 Merge pull request #215 from KrystalDelusion/master
• 37140e7 Fixing golden/fifo.sv
• 9edb6ee Merge pull request #214 from jix/no_vcd
• 168d667 Add vcd option to make VCD writing optional
• 17c3961 Merge pull request #213 from jix/fix_tests
• 326247f tests: Skip broken tests
• 586be8b tests: Fix test_rules.py after sby config parser changes
• 4adb99e Merge pull request #174 from KrystalDelusion/fifo_example
• Additional commits viewable in compare view

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