Set default landing page for pkgdown docs to `latest-tag` #938

All 198 tests pass in 1m 32s

1 files ±0 24 suites ±0 1m 32s ⏱️ -2s
198 tests ±0 198 ✅ ±0 0 💤 ±0 0 ❌ ±0
1 509 runs ±0 1 509 ✅ ±0 0 💤 ±0 0 ❌ ±0

Results for commit edef43b. ± Comparison against earlier commit 540456a.