lite build fix: install build package (#6999)

* install build package

* add changeset

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/cruel-nights-move.md

@@ -0,0 +1,5 @@
+---
+"@gradio/lite": minor
+---
+
+feat:lite build fix: install build package 

.github/workflows/publish-npm.yml

@@ -25,7 +25,9 @@ jobs:
           npm_token: ${{ secrets.NPM_TOKEN }}
           skip_build: 'true'
       - name: Build packages
-        run: pnpm --filter @gradio/client --filter @gradio/lite build
+        run: | 
+          python -m pip install build
+          pnpm --filter @gradio/client --filter @gradio/lite build
       - name: create and publish versions
         id: changesets
         uses: changesets/action@v1

js/lite/index.html

@@ -30,7 +30,7 @@
 import gradio as gr
 
 def greet(name):
-		return "Hello, " + name + "!"
+		return "Hello " + name + "!"
 
 gr.Interface(fn=greet, inputs="text", outputs="text").launch()
 `,