Fix test:storybook:update (#31173)

Author: langleyd

packages/shared-components/package.json

@@ -43,7 +43,7 @@
         "lint:types": "tsc --noEmit --jsx react",
         "test:storybook": "test-storybook --url http://localhost:6007/",
         "test:storybook:ci": "concurrently -k -s first -n \"SB,TEST\" \"yarn storybook --no-open\" \"wait-on tcp:6007 && yarn test-storybook --url http://localhost:6007/ --ci --maxWorkers=2\"",
-        "test:storybook:update": "playwright-screenshots --entrypoint yarn --with-node-modules && playwright-screenshots --entrypoint /work/node_modules/.bin/test-storybook --with-node-modules --url http://host.docker.internal:6007/ --updateSnapshot"
+        "test:storybook:update": "playwright-screenshots --entrypoint /work/node_modules/.bin/test-storybook --with-node-modules --url http://host.docker.internal:6007/ --updateSnapshot"
     },
     "dependencies": {
         "classnames": "^2.5.1",
@@ -55,6 +55,8 @@
         "temporal-polyfill": "^0.3.0"
     },
     "devDependencies": {
+        "@element-hq/element-web-playwright-common": "^2.0.0",
+        "@playwright/test": "^1.50.1",
         "@storybook/addon-a11y": "^9.1.10",
         "@storybook/addon-designs": "^10.0.2",
         "@storybook/addon-docs": "^9.1.10",