Test building packages

Also revert commit d22ca54 "Replaced
non-ascii charactor. It fails version detection at `net-http.gemspec`."

Author: nobu

.github/workflows/test.yml

@@ -20,3 +20,7 @@ jobs:
       run: bundle install
     - name: Run test
       run: rake test
+    - name: Build
+      run: rake build
+      env:
+        LANG: C

lib/net/http.rb

@@ -656,7 +656,7 @@ class HTTPHeaderSyntaxError < StandardError; end
   # - {:min_version=}[rdoc-ref:Net::HTTP#min_version=]:
   #   Sets the minimum SSL version.
   # - {#peer_cert}[rdoc-ref:Net::HTTP#peer_cert]:
-  #   Returns the X509 certificate chain for the session's socket peer.
+  #   Returns the X509 certificate chain for the session’s socket peer.
   # - {:ssl_version}[rdoc-ref:Net::HTTP#ssl_version]:
   #   Returns the SSL version.
   # - {:ssl_version=}[rdoc-ref:Net::HTTP#ssl_version=]: