改行コードをLFに統一 (#9926)

* chore: update gitattribute editorconfig

* Normalize all the line endings

.github/workflows/check_copyright_year.yml

@@ -1,18 +1,18 @@
-name: Check copyright year
-
-on:
-  push:
-    branches:
-      - master
-      - develop
-
-jobs:
-  check_copyright_year:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3.2.0
-    - run: |
-        if [ "$(grep Copyright COPYING | sed -e 's/.*2014-\([0-9]*\) .*/\1/g')" -ne "$(date +%Y)" ]; then
-          echo "Please change copyright year!"
-          exit 1
-        fi
+name: Check copyright year
+
+on:
+  push:
+    branches:
+      - master
+      - develop
+
+jobs:
+  check_copyright_year:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3.2.0
+    - run: |
+        if [ "$(grep Copyright COPYING | sed -e 's/.*2014-\([0-9]*\) .*/\1/g')" -ne "$(date +%Y)" ]; then
+          echo "Please change copyright year!"
+          exit 1
+        fi