Update actions/checkout requirement to v2.3.4 (jaegertracing#1381)

Updates the requirements on [actions/checkout](https://github.com/actions/checkout) to permit the latest version.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/commits/5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f)

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

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

.github/workflows/base-checks.yaml

@@ -13,7 +13,7 @@ jobs:
     - uses: actions/setup-go@v2.1.3
       with:
         go-version: '1.14.4'
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
     - uses: jpkrohling/setup-operator-sdk@v1.0.2
       with:
         operator-sdk-version: v0.18.2

.github/workflows/codeql.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v1

.github/workflows/e2e-kubernetes.yaml

@@ -23,7 +23,7 @@ jobs:
     - uses: jpkrohling/setup-operator-sdk@v1.0.2
       with:
         operator-sdk-version: v0.18.2
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
 
     - name: "setup docker"
       run: ./.ci/setup-docker.sh

.github/workflows/publish-images.yaml

@@ -8,7 +8,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
     - uses: docker/setup-qemu-action@v1
     - uses: docker/setup-buildx-action@v1
     - name: "publishes the images"

.github/workflows/release.yaml

@@ -11,7 +11,7 @@ jobs:
     - uses: actions/setup-go@v2.1.3
       with:
         go-version: '1.14.4'
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
     - uses: jpkrohling/setup-operator-sdk@v1.0.2
       with:
         operator-sdk-version: v0.18.2