Install forge before running pre-commit

Author: jannikluhn

.github/workflows/pre-commit.yml

@@ -7,5 +7,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
       - uses: actions/setup-python@v3
+
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+
       - uses: pre-commit/[email protected]