ci: bump version

Author: syjn99

.github/workflows/prove.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: true
 
     name: Build
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
         with:
@@ -25,7 +25,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.81.0
+          toolchain: 1.85.0
 
       - name: Install SP1 toolchain
         run: |