build: update actions/checkout and actions/setup-python (#231)

Source-Link: googleapis/synthtool@3551acd
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:230f7fe8a0d2ed81a519cfc15c6bb11c5b46b9fb449b8b1219b3771bcb520ad2

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:2f155882785883336b4468d5218db737bb1d10c9cea7cb62219ad16fe248c03c
-# created: 2023-11-29T14:54:29.548172703Z
+  digest: sha256:230f7fe8a0d2ed81a519cfc15c6bb11c5b46b9fb449b8b1219b3771bcb520ad2
+# created: 2023-12-09T15:16:25.430769578Z

.github/workflows/docs.yml

@@ -8,9 +8,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.9"
     - name: Install nox
@@ -24,9 +24,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.10"
     - name: Install nox

.github/workflows/lint.yml

@@ -8,9 +8,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.8"
     - name: Install nox

.github/workflows/unittest.yml

@@ -11,9 +11,9 @@ jobs:
         python: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python }}
     - name: Install nox
@@ -37,9 +37,9 @@ jobs:
         - unit
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Setup Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v5
       with:
         python-version: "3.8"
     - name: Install coverage