Update actions/checkout digest to 85e6279

Author: renovate[bot]

.github/workflows/rust.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     # actions/checkout@v2
-    - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+    - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
     - uses: actions-rs/toolchain@88dc2356392166efad76775c878094f4e83ff746
       with:
         toolchain: stable
@@ -38,7 +38,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest ]
     steps:
     # actions/checkout@v2
-    - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
+    - uses: actions/checkout@85e6279cec87321a52edac9c87bce653a07cf6c2
     - uses: dtolnay/rust-toolchain@v1
       with:
         toolchain: ${{ matrix.toolchain }}