Update the opensearch-rails gem (RM-2427).

- Remove github workflows for Ruby < 2.7.
- Add github workflow for Ruby 3.2 and (hopefully) fix 2.7 (untested).

Author: martijnbolhuis

.github/workflows/2.5.yml

@@ -13,7 +13,7 @@ jobs:
   tests:
     env:
       TEST_ES_SERVER: http://localhost:9200
-      RAILS_VERSIONS: '5.0,6.0'
+      RAILS_VERSIONS: '6.1,7.1'
     strategy:
       fail-fast: false
     runs-on: ubuntu-latest
@@ -34,7 +34,7 @@ jobs:
     - name: Bundle
       run: |
         sudo apt-get install libsqlite3-dev
-        gem install bundler
+        gem install bundler -v 2.4.22
         bundle install
         bundle exec rake bundle:clean
         bundle exec rake bundle:install

.github/workflows/2.6.yml

@@ -1,4 +1,4 @@
-name: Ruby 2.4
+name: Ruby 3.2
 on:
   push:
     branches:
@@ -13,7 +13,7 @@ jobs:
   tests:
     env:
       TEST_ES_SERVER: http://localhost:9200
-      RAILS_VERSIONS: '5.0'
+      RAILS_VERSIONS: '7.1'
     strategy:
       fail-fast: false
     runs-on: ubuntu-latest
@@ -30,7 +30,7 @@ jobs:
         cluster-version: 2
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.4
+        ruby-version: 3.2
     - name: Bundle
       run: |
         sudo apt-get install libsqlite3-dev