extensions_ui: Fix extension author list overflow (#51045)

Closes #50995 

Before you mark this PR as ready for review, make sure that you have:
- [ ] Added a solid test coverage and/or screenshots from doing manual
testing
- [x] Done a self-review taking into account security and performance
aspects
- [x] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

Release Notes:

- Fixed extension author's list overflow

<img width="1326" height="369" alt="image"
src="https://github.com/user-attachments/assets/4b2cf9cb-d3c3-4d71-a4fd-9436fb7b1469"
/>

---------

Co-authored-by: Danilo Leal <daniloleal09@gmail.com>

crates/extensions_ui/src/extensions_ui.rs

@@ -870,9 +870,12 @@ impl ExtensionsPage {
             )
             .child(
                 h_flex()
+                    .min_w_0()
+                    .w_full()
                     .justify_between()
                     .child(
                         h_flex()
+                            .min_w_0()
                             .gap_1()
                             .child(
                                 Icon::new(IconName::Person)
@@ -889,6 +892,7 @@ impl ExtensionsPage {
                     .child(
                         h_flex()
                             .gap_1()
+                            .flex_shrink_0()
                             .child({
                                 let repo_url_for_tooltip = repository_url.clone();