Merge pull request #286 from rspec/add-187-to-3-10

Move 1.8.7 to GHA in 3.10

Author: JonRowe

ci/.github/workflows/ci.yml

@@ -81,6 +81,9 @@ jobs:
           - version: "1.9.2"
             tag: rspec/ci:1.9.2
             options: "--add-host rubygems.org:151.101.0.70 --add-host api.rubygems.org:151.101.0.70"
+          - version: "1.8.7"
+            tag: rspec/ci:1.8.7
+            options: "--add-host rubygems.org:151.101.0.70 --add-host api.rubygems.org:151.101.0.70"
           - version: "REE"
             tag: rspec/ci:ree
             options: "--add-host rubygems.org:151.101.0.70 --add-host api.rubygems.org:151.101.0.70"