Bump actions/checkout from 5 to 6 in the actions group

Bumps the actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ jobs:
 
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 10
               persist-credentials: false
@@ -73,7 +73,7 @@ jobs:
             CFLAGS: -funsigned-char
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 0  # needed for :commit: docs role
               persist-credentials: false
@@ -145,7 +145,7 @@ jobs:
             KITTY_BUNDLE: 1
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 10
               persist-credentials: false
@@ -166,7 +166,7 @@ jobs:
         runs-on: macos-latest
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 0  # needed for :commit: docs role
               persist-credentials: false
@@ -204,7 +204,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 10
               persist-credentials: false

.github/workflows/codeql-analysis.yml

@@ -39,7 +39,7 @@ jobs:
         steps:
 
         - name: Checkout repository
-          uses: actions/checkout@v5
+          uses: actions/checkout@v6
           with:
               # We must fetch at least the immediate parents so that if this is
               # a pull request then we can checkout the head.

.github/workflows/depscan.yml

@@ -22,13 +22,13 @@ jobs:
             KITTY_BUNDLE: 1
         steps:
           - name: Checkout source code
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 10
               persist-credentials: false
 
           - name: Checkout bypy
-            uses: actions/checkout@v5
+            uses: actions/checkout@v6
             with:
               fetch-depth: 1
               persist-credentials: false