refactor(workflows/ci): reads supported Foundry version from env vari…

…able (#271)

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ env:
   NODE_MODULE_CACHE_VERSION: 5
   NODE_OPTIONS: '--max-old-space-size=4096'
   TERM: dumb
+  # Supported Foundry version defined at celo-org (GitHub organisation) level, for consistency across workflows.
+  SUPPORTED_FOUNDRY_VERSION: ${{ vars.SUPPORTED_FOUNDRY_VERSION }}
 
 # EXAMPLE on debug ssh step
 #  - name: Setup tmate session
@@ -235,7 +237,7 @@ jobs:
       - name: Install Foundry
         uses: foundry-rs/foundry-toolchain@v1
         with:
-          version: "nightly-f625d0fa7c51e65b4bf1e8f7931cd1c6e2e285e9"
+          version: ${{ env.SUPPORTED_FOUNDRY_VERSION }}
       # NODE_OPTIONS="--experimental-vm-modules" is needed because @viem/anvil uses dynamic imports
       - name: Run tests
         run: |