chore(deps): bump actions/checkout from 6.0.2 to 6.0.3 (#193)

Bumps [actions/checkout](https://github.com/actions/checkout) from 6.0.2 to 6.0.3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@de0fac2...df4cb1c)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
 
       - name: Setup Rust
         uses: actions-rust-lang/setup-rust-toolchain@46268bd060767258de96ed93c1251119784f2ab6
@@ -86,7 +86,7 @@ jobs:
           - "16/16"
 
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
         with:
           persist-credentials: false
 

.github/workflows/deny.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           persist-credentials: false
       - uses: EmbarkStudios/cargo-deny-action@bb137d7af7e4fb67e5f82a49c4fce4fad40782fe # v2.0.20

.github/workflows/mdbook.yml

@@ -31,7 +31,7 @@ jobs:
     # Only run on the main repository, not on forks
     if: github.repository == 'agentclientprotocol/rust-sdk'
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
 
       - name: Install mdBook
         uses: taiki-e/install-action@6887963ccf37a9ddcd8c5fa4baeb3e1e5fd61fa1

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - &checkout
         name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
         with:
           fetch-depth: 0
           persist-credentials: false