Merge branch 'v1.15'

* v1.15:
  Update actions/checkout to v3 (#1426)

Author: alcaeus

.github/workflows/arginfo-files.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v2"
+        uses: "actions/checkout@v3"
         with:
           submodules: true
 

.github/workflows/clang-format.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v2"
+        uses: "actions/checkout@v3"
         with:
           submodules: true