Restrict v0.0.7 of the zed_extension_api to dev builds, for now (#12170)

This PR restricts usage of v0.0.7 of the `zed_extension_api` to dev
builds, for now.

As we're still making changes to it, we don't want to ship a version of
Zed to Preview/Stable that claims to support a yet-unreleased version of
the extension API.

Release Notes:

- N/A

crates/extensions_ui/src/extensions_ui.rs

@@ -16,6 +16,7 @@ use gpui::{
     FontWeight, InteractiveElement, KeyContext, ParentElement, Render, Styled, Task, TextStyle,
     UniformListScrollHandle, View, ViewContext, VisualContext, WeakView, WhiteSpace, WindowContext,
 };
+use release_channel::ReleaseChannel;
 use settings::Settings;
 use std::ops::DerefMut;
 use std::time::Duration;
@@ -602,7 +603,8 @@ impl ExtensionsPage {
         has_dev_extension: bool,
         cx: &mut ViewContext<Self>,
     ) -> (Button, Option<Button>) {
-        let is_compatible = extension::is_version_compatible(&extension);
+        let is_compatible =
+            extension::is_version_compatible(ReleaseChannel::global(cx), &extension);
 
         if has_dev_extension {
             // If we have a dev extension for the given extension, just treat it as uninstalled.