Merge pull request #2833 from ruby/fix-ci

Fix erb installation failure

Author: soutaro

.github/workflows/c-check.yml

@@ -46,6 +46,8 @@ jobs:
         run: |
           ruby -v
           gem update --system
+      - name: install erb
+        run: gem install erb
       - name: bin/setup
         run: |
           bin/setup

.github/workflows/comments.yml

@@ -26,6 +26,8 @@ jobs:
         run: |
           ruby -v
           gem update --system
+      - name: install erb
+        run: gem install erb
       - name: bin/setup
         run: |
           bin/setup

.github/workflows/ruby.yml

@@ -52,6 +52,8 @@ jobs:
         run: |
           ruby -v
           gem update --system
+      - name: install erb
+        run: gem install erb
       - name: bundle config set with
         run: |
           echo "NO_MINITEST=true" >> $GITHUB_ENV
@@ -96,6 +98,8 @@ jobs:
         run: |
           ruby -v
           gem update --system
+      - name: install erb
+        run: gem install erb
       - name: clang version
         run: clang --version
       - name: bundle config set force_ruby_platform true if head