Update foundry-rs/foundry-toolchain action to v1.5.0

Author: renovate[bot]

.github/workflows/test.yml

@@ -85,7 +85,7 @@ jobs:
       # Solidity setup
       - name: Install Foundry
         if: matrix.package == 'solidity'
-        uses: foundry-rs/foundry-toolchain@82dee4ba654bd2146511f85f0d013af94670c4de #v1.4.0
+        uses: foundry-rs/foundry-toolchain@50d5a8956f2e319df19e6b57539d7e2acb9f8c1e # v1.5.0
 
       # ----------------------------
       # Stellar compile setup