Bump actions/checkout from 3 to 4 (#220)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joao Grassi <joao.grassi@dynatrace.com>
Co-authored-by: Josh Suereth <joshuasuereth@google.com>

.github/workflows/cpp_format_tools.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Build the Docker image
       run: docker build cpp_format_tools/. -t cpp_format_tools

.github/workflows/markdown.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: check out code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: install markdownlint
       run: sudo npm install -g markdownlint-cli

.github/workflows/protobuf-dockerimage.yml

@@ -17,7 +17,7 @@ jobs:
         TARGETARCH: [amd64]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build the Docker image
       run: docker build protobuf/. -t build-protobuf
       env:

.github/workflows/schema_tools.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Build the Docker image
       run: docker build schemas/. -t build-tool-schemas

.github/workflows/semconvgen.yml

@@ -16,7 +16,7 @@ jobs:
       run: 
         working-directory: semantic-conventions/
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
       with:
         python-version: '3.x'
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: tests
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
     - name: Build the wheel
       run: |