chore: Move workspace dependencies to workspace.dependencies (#7454)

We should prefer referring to local deps via `.workspace = true` from
now on.

Release Notes:

- N/A

crates/install_cli/Cargo.toml

@@ -13,7 +13,7 @@ test-support = []
 
 [dependencies]
 anyhow.workspace = true
-gpui = { path = "../gpui" }
+gpui.workspace = true
 log.workspace = true
 smol.workspace = true
-util = { path = "../util" }
+util.workspace = true