Update actions/checkout digest to 6d193bf (#1106)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/rust.yml

@@ -16,7 +16,7 @@ jobs:
   check-style:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@2d7d9f7ff5b310f983d059b68785b3c74d8b8edd
+      - uses: actions/checkout@6d193bf28034eafb982f37bd894289fe649468fc
       - name: Report cargo version
         run: cargo --version
       - name: Report rustfmt version
@@ -27,7 +27,7 @@ jobs:
   clippy-lint:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@2d7d9f7ff5b310f983d059b68785b3c74d8b8edd
+      - uses: actions/checkout@6d193bf28034eafb982f37bd894289fe649468fc
       - name: Report cargo version
         run: cargo --version
       - name: Report Clippy version
@@ -47,7 +47,7 @@ jobs:
           - features: all
             feature_flags: --all-features
     steps:
-      - uses: actions/checkout@2d7d9f7ff5b310f983d059b68785b3c74d8b8edd
+      - uses: actions/checkout@6d193bf28034eafb982f37bd894289fe649468fc
       - name: Report cargo version
         run: cargo --version
       - name: Report rustc version