Update ruby version

Author: syohex

.github/workflows/test.yml

@@ -7,6 +7,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: Build site
       run: 'make build'

Dockerfile

@@ -1,6 +1,6 @@
 ## Dockerfile
 
-FROM ruby:2.7
+FROM ruby:3.3
 
 COPY Gemfile /
 

Gemfile.lock

@@ -233,8 +233,8 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
+    rexml (3.3.3)
+      strscan
     rouge (3.26.0)
     ruby-enum (0.9.0)
       i18n