bump checkout setup-node setup-python from v2 to v3 (#723)

README.md

@@ -146,7 +146,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           submodules: true  # Fetch Hugo themes (true OR recursive)
           fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
@@ -480,7 +480,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Some build
 
@@ -651,10 +651,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -699,10 +699,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -749,10 +749,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -804,10 +804,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -860,10 +860,10 @@ jobs:
       run:
         working-directory: website
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -915,10 +915,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
         with:
           python-version: '3.8'
 
@@ -975,7 +975,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1
@@ -1014,7 +1014,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Flutter
         run: |
@@ -1058,10 +1058,10 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Setup Node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
           node-version: '14'
 
@@ -1107,7 +1107,7 @@ jobs:
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: actions/cache@v2
         with: