ci: get chromatic token from aws

.github/workflows/chromatic.yml

@@ -9,6 +9,18 @@ jobs:
   chromatic-deployment:
     runs-on: ubuntu-latest
     steps:
+      - name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v2
+        with:
+          audience: https://github.com/launchdarkly
+          role-to-assume: ${{ vars.AWS_ROLE_ARN }}
+          aws-region: us-east-1
+
+      - uses: dkershner6/aws-ssm-getparameters-action@v1
+        with:
+          parameterPairs: '/production/common/launchpad-ui/chromatic-token = CHROMATIC_TOKEN'
+          withDecryption: 'true'
+
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
@@ -29,7 +41,7 @@ jobs:
         env:
           NODE_OPTIONS: '--max_old_space_size=4096'
         with:
-          projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
+          projectToken: ${{ env.CHROMATIC_TOKEN }}
           buildScriptName: 'storybook:build'
           exitOnceUploaded: true
           onlyChanged: true