fix: contracts testing workflow

Author: jaybuidl

.github/workflows/contracts-testing.yml

@@ -42,7 +42,7 @@ jobs:
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         submodules: recursive
-        
+
     - name: Set up corepack (for yarn)
       run: |
         corepack enable
@@ -69,7 +69,7 @@ jobs:
 
     - name: Install contracts dependencies
       run: |
-        yarn workspace @kleros/kleros-v2-contracts install
+        YARN_ENABLE_HARDENED_MODE=0 yarn workspace @kleros/kleros-v2-contracts install
 
     - name: Install Foundry
       uses: foundry-rs/foundry-toolchain@8f1998e9878d786675189ef566a2e4bf24869773 # v1.2.0