fix: add Foundry installation step in admin role transfer workflow

Author: gfournierPro

.github/workflows/accept-admin-safe.yml

@@ -22,7 +22,12 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-
+        
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+        with:
+          version: nightly
+      
       - name: Execute Transfer Admin Role
         id: transfer-admin
         uses: iExecBlockchainComputing/safe-tx-proposer@feature/wrap-it-gha