chore: Update to Rust version 1.85.0 (#1860)

This is a small step toward fixing #1727

.github/workflows/ci.yml

@@ -122,7 +122,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        toolchain: ["1.74.0", "stable"]
+        toolchain: ["1.85.0", "stable"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -191,7 +191,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toolchain: ["1.74.0", "stable"]
+        toolchain: ["1.85.0", "stable"]
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable