chore(deps): update actions/checkout action to v2 (#2998)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

.github/workflows/assets.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install Go
         uses: actions/setup-go@v2
         with:

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install
         run: |
           git config --global user.email "github@spam.cozycloud.cc"

.github/workflows/cli.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install Go
         uses: actions/setup-go@v2
         with:

.github/workflows/integration.yml

@@ -43,7 +43,7 @@ jobs:
         with:
           ruby-version: '2.x'
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
       - name: Install
         run: |
           curl -X PUT http://127.0.0.1:5984/{_users,_replicator}

.github/workflows/windows.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v1
+        uses: actions/checkout@v2
         with:
           fetch-depth: 1
       - name: Build