fix: add missing yarn install in provision workflow (#1986)

.github/workflows/cypress-liquidity-provision-dashboard-e2e.yml

@@ -23,6 +23,11 @@ jobs:
             /home/runner/.cache/Cypress
           key: node_modules_cypress-${{ hashFiles('frontend-monorepo/yarn.lock') }}
 
+      # Install frontend dependencies
+      - name: Install root dependencies
+        run: yarn install --frozen-lockfile
+        working-directory: frontend-monorepo
+
       # To make sure that all Cypress binaries are installed properly
       - name: Install cypress bins
         run: yarn cypress install