Bump actions/checkout from 2.3.4 to 2.3.5 (GoogleContainerTools#3481)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.4 to 2.3.5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.4...v2.3.5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/gradle-wrapper-validation.yml

@@ -6,5 +6,5 @@ jobs:
     name: "Gradle wrapper validation"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.3.5
       - uses: gradle/wrapper-validation-action@v1.0.4

.github/workflows/jib-cli-release.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Build project
         run: |

.github/workflows/prepare-release.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v2.3.5
 
       - name: Check input
         run: |

.github/workflows/sonar.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Get current date
         id: date
         run: echo "::set-output name=date::$(date +'%Y-%m-%d' --utc)"
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.5
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Set up JDK 11

.github/workflows/unit-tests.yml

@@ -17,7 +17,7 @@ jobs:
       # for gradle
       TERM: dumb
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.3.5
         with:
           fetch-depth: 2
       - uses: actions/setup-java@v2.3.1