Revert "chore: Bump taffy to 0.5.2 (#18729)" (#19189)

This reverts commit a99750fd35.

@huacnlee found that commit to have a bad impact on perf and triaged it
for us in
https://github.com/zed-industries/zed/pull/18729#issuecomment-2410445980
Closes #ISSUE

Release Notes:

- N/A

crates/gpui/Cargo.toml

@@ -103,7 +103,7 @@ smallvec.workspace = true
 smol.workspace = true
 strum.workspace = true
 sum_tree.workspace = true
-taffy = "0.5"
+taffy = "0.4.3"
 thiserror.workspace = true
 util.workspace = true
 uuid.workspace = true