Update litegraph (Pin/Unpin selected nodes) (#791)

* Update litegraph (Pin/Unpin selected nodes)

* Checkout head_ref first

* nit

* Update test expectations [skip ci]

---------

Co-authored-by: github-actions <github-actions@github.com>

browser_tests/rightClickMenu.spec.ts

@@ -118,4 +118,20 @@ test.describe('Node Right Click Menu', () => {
       'right-click-unpinned-node-moved.png'
     )
   })
+
+  test('Can pin/unpin selected nodes', async ({ comfyPage }) => {
+    await comfyPage.select2Nodes()
+    await comfyPage.page.keyboard.down('Control')
+    await comfyPage.rightClickEmptyLatentNode()
+    await comfyPage.page.click('.litemenu-entry:has-text("Pin")')
+    await comfyPage.page.keyboard.up('Control')
+    await comfyPage.nextFrame()
+    await expect(comfyPage.canvas).toHaveScreenshot('selected-nodes-pinned.png')
+    await comfyPage.rightClickEmptyLatentNode()
+    await comfyPage.page.click('.litemenu-entry:has-text("Unpin")')
+    await comfyPage.nextFrame()
+    await expect(comfyPage.canvas).toHaveScreenshot(
+      'selected-nodes-unpinned.png'
+    )
+  })
 })