Update docs to use the new `teal_data` instead of `TealData` #778

All 16 tests pass in 0s

  1 files ±0   5 suites ±0 0s ⏱️ ±0s
16 tests ±0 16 ✔️ ±0 0 💤 ±0 0 ❌ ±0
49 runs ±0 49 ✔️ ±0 0 💤 ±0 0 ❌ ±0

Results for commit c031262. ± Comparison against earlier commit 4b064a0.