Fix missing closing brace for PythonEnvironments namespace

Re-indent the api() function back inside the namespace and restore the
namespace's closing brace that was dropped during a manual edit.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: edvilme

src/api.ts

@@ -1421,13 +1421,14 @@ export namespace PythonEnvironments {
     /**
      * Returns the API exposed by the Python Environments extension in VS Code.
      */
-export async function api(): Promise<PythonEnvironmentApi> {
-    const extension = extensions.getExtension<PythonEnvironmentApi>(EXTENSION_ID);
-    if (extension === undefined) {
-        throw new Error(`Python Environments extension (${EXTENSION_ID}) is not installed or is disabled`);
+    export async function api(): Promise<PythonEnvironmentApi> {
+        const extension = extensions.getExtension<PythonEnvironmentApi>(EXTENSION_ID);
+        if (extension === undefined) {
+            throw new Error(`Python Environments extension (${EXTENSION_ID}) is not installed or is disabled`);
+        }
+        if (!extension.isActive) {
+            await extension.activate();
+        }
+        return extension.exports;
     }
-    if (!extension.isActive) {
-        await extension.activate();
-    }
-    return extension.exports;
 }