chore(deps): pin dependencies (#1960)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://togithub.com/actions/checkout) | action |
pinDigest | -> `f43a0e5` |
| [pdm-project/setup-pdm](https://togithub.com/pdm-project/setup-pdm) |
action | pinDigest | -> `ddc33ca` |

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.github/workflows/python.yaml

@@ -19,9 +19,9 @@ jobs:
         os: [ubuntu-latest, macOS-latest, windows-latest]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Set up PDM
-        uses: pdm-project/setup-pdm@v3
+        uses: pdm-project/setup-pdm@ddc33ca746b5716353581f988b29464200212702 # v3
         with:
           python-version: ${{ matrix.python-version }}