github actions: update recommended Rust to 1.86

Signed-off-by: Chung Chung <cchung@redhat.com>

Author: C2Redhat

.github/workflows/ci.yml

@@ -82,7 +82,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           components: cargo
-          toolchain: 1.85.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
+          toolchain: 1.86.0  # CURRENT DEVELOPMENT RUST TOOLCHAIN
       - name: Check out ci repo
         run: git clone https://github.com/stratis-storage/ci.git
       - name: Run comparisons of version specs with available Fedora packages