Bump actions/checkout from 2 to 3

.github/workflows/climpred_installs.yml

@@ -17,7 +17,7 @@ jobs:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - uses: xarray-contrib/[email protected]
@@ -35,7 +35,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
       with:
             fetch-depth: 0 # Fetch all history for all branches and tags.
     - name: Setup python

.github/workflows/climpred_testing.yml

@@ -17,7 +17,7 @@ jobs:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - uses: xarray-contrib/[email protected]
@@ -38,7 +38,7 @@ jobs:
       matrix:
         python-version: [3.7, 3.8, 3.9]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
             fetch-depth: 0 # Fetch all history for all branches and tags.
       - name: Set up conda
@@ -74,7 +74,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: conda-incubator/setup-miniconda@v2
         with:
           channels: conda-forge
@@ -104,7 +104,7 @@ jobs:
         run:
           shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Conda
         uses: conda-incubator/setup-miniconda@v2
         with:

.github/workflows/lint.yml

@@ -6,7 +6,7 @@ jobs:
   lint:  # Runs linting package checks for code styling.
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python
         uses: actions/setup-python@v2
         with:

.github/workflows/python-publish.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@master
+        uses: actions/checkout@v3
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1
@@ -28,7 +28,7 @@ jobs:
     needs: release
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python
       uses: actions/setup-python@v1
       with:

.github/workflows/upstream-dev-ci.yml

@@ -18,7 +18,7 @@ jobs:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
       - uses: xarray-contrib/[email protected]
@@ -47,7 +47,7 @@ jobs:
     outputs:
       artifacts_availability: ${{ steps.status.outputs.ARTIFACTS_AVAILABLE }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0 # Fetch all history for all branches and tags.
       - uses: conda-incubator/setup-miniconda@v2
@@ -105,7 +105,7 @@ jobs:
       run:
         shell: bash
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: "3.x"