bump to rust v1.78.0

Signed-off-by: Luca Vaccaro <me@lvaccaro.com>

Author: lvaccaro

.github/workflows/publish-swift-package.yml

@@ -21,7 +21,7 @@ jobs:
         run: |
           echo "New tag: ${VERSION}"
       - name: Setup rust toolchain
-        uses: dtolnay/rust-toolchain@1.75.0
+        uses: dtolnay/rust-toolchain@1.78.0
         with:
           targets: x86_64-apple-ios,aarch64-apple-ios,aarch64-apple-ios-sim
       - name: Setup just