update expected shasum value

Author: arik-so

.github/workflows/swift.yml

@@ -43,7 +43,7 @@ jobs:
                     fi
                     tar xvvf swift-5.6-RELEASE-ubuntu20.04.tar.gz
                 env:
-                    EXPECTED_SWIFT_SHASUM: 86b849d9f6ba2eda4e12ea5eafaa0748bffcd6272466b514c2b0fd4a829c63a4
+                    EXPECTED_SWIFT_SHASUM: 3f0d926bfc08eea00a69b1d992f2ab5e08155d97476096a3ef959fe7c4cbd58b
             -   name: Install native Rust toolchain, Valgrind, and build utilitis
                 run: |
                     sudo apt-get update