chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -46,7 +46,7 @@ jobs:
   lint:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - name: ruff format
       uses: chartboost/ruff-action@e18ae971ccee1b2d7bbef113930f00c670b78da4 # v1
       with:
@@ -73,7 +73,7 @@ jobs:
         ports:
           - 27017:27017
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - name: "Set up environment"
       uses: packetcoders/action-setup-cache-python-poetry@0d0be5577b30d85f3fa2d93a4beeda149520f120 # v1.2.0
       with:
@@ -90,7 +90,7 @@ jobs:
     runs-on: ubuntu-24.04
     needs: [lint]
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - name: "Set up environment"
       uses: packetcoders/action-setup-cache-python-poetry@0d0be5577b30d85f3fa2d93a4beeda149520f120 # v1.2.0
       with:
@@ -123,7 +123,7 @@ jobs:
     if: ${{ fromJSON(needs.check_version.outputs.should_publish) }}
 
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     # bits borrowed from packetcoders/action-setup-cache-python-poetry, in order
     # to reuse the poetry cache without actually restoring the venv
     - name: Set up python ${{ inputs.python-version }}