build(deps): bump actions/checkout from 4.1.0 to 4.1.2

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.1.0 to 4.1.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@8ade135...9bb5618)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
 
     # Our tests require Nim to be installed to `/nim` because some error messages contain
     # e.g. `/nim/lib/pure/unittest.nim(654)`.
@@ -43,7 +43,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
 
     - name: Download all `exercism/nim` exercises
       run: git clone --depth 1 https://github.com/exercism/nim.git
@@ -72,7 +72,7 @@ jobs:
         # Fail if the output JSON is not as expected.
         diff results.json expected_results.json
 
-    - uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
       with:
         repository: 'ynfle/diff'
         ref: 'ae470e7702fd07a6ea850b2a6f2de701130fa048'

.github/workflows/lint_dockerfile.yml

@@ -7,7 +7,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
 
       - name: Run hadolint
         uses: hadolint/hadolint-action@54c9adbab1582c2ef04b2016b760714a4bfde3cf

.github/workflows/shellcheck.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
 
       - name: Run shellcheck
         uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38