chore(deps): update actions/checkout action to v3 (#1952)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/partial-backend.yml

@@ -30,7 +30,7 @@ jobs:
     # Steps
     steps:
       - name: Check out repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up python
         uses: actions/setup-python@v4

.github/workflows/partial-builder.yml

@@ -18,7 +18,7 @@ jobs:
     name: Build Frontend
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up QEMU
         id: qemu
@@ -50,7 +50,7 @@ jobs:
     name: Build Backend
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Set up QEMU
         id: qemu

.github/workflows/release.yml

@@ -32,7 +32,7 @@ jobs:
       - build-release
     steps:
       - name: Checkout main
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Deploy docs
         uses: mhausenblas/mkdocs-deploy-gh-pages@master