Add code owners and remove reviewers from dependabot

Author: atm-snag2

.github/CODEOWNERS

@@ -0,0 +1,9 @@
+# package-ecosystem: github-actions, directories: /
+/.github/workflows @increments/qiita-dev-group
+
+# package-ecosystem: github-actions, directories: /actions/publish
+/actions/publish/action.yml @increments/qiita-dev-group
+
+# package-ecosystem: npm, directories: /
+/package.json @increments/qiita-dev-group
+/yarn.lock @increments/qiita-dev-group

.github/dependabot.yml

@@ -8,8 +8,6 @@ updates:
       time: "14:00"
       timezone: "Asia/Tokyo"
     open-pull-requests-limit: 5
-    reviewers:
-      - "increments/qiita-dev-group"
 
   - package-ecosystem: "github-actions"
     directory: "/actions/publish"
@@ -19,8 +17,6 @@ updates:
       time: "14:00"
       timezone: "Asia/Tokyo"
     open-pull-requests-limit: 5
-    reviewers:
-      - "increments/qiita-dev-group"
 
   - package-ecosystem: "npm"
     directory: "/"
@@ -31,5 +27,3 @@ updates:
       timezone: "Asia/Tokyo"
     versioning-strategy: increase
     open-pull-requests-limit: 5
-    reviewers:
-      - "increments/qiita-dev-group"