gpui: Rename rounded_md to rounded_sm (#26228)

This PR renames the `rounded_md` style method to `rounded_sm`.

Follow up to https://github.com/zed-industries/zed/pull/26221, which
freed up the `rounded_sm` name.

Release Notes:

- N/A

crates/recent_projects/src/remote_servers.rs

@@ -914,7 +914,7 @@ impl RemoteServerProjects {
             .child(
                 h_flex()
                     .bg(theme.colors().editor_background)
-                    .rounded_b_md()
+                    .rounded_b_sm()
                     .w_full()
                     .map(|this| {
                         if let Some(ssh_prompt) = ssh_prompt {

crates/recent_projects/src/ssh_connections.rs

@@ -331,7 +331,7 @@ impl RenderOnce for SshConnectionHeader {
             .px(DynamicSpacing::Base12.rems(cx))
             .pt(DynamicSpacing::Base08.rems(cx))
             .pb(DynamicSpacing::Base04.rems(cx))
-            .rounded_t_md()
+            .rounded_t_sm()
             .w_full()
             .gap_1p5()
             .child(Icon::new(IconName::Server).size(IconSize::XSmall))