Revert "Reapply "Update regex to allow flexible changelog entries""

This reverts commit cdb30b3.

Author: richardwang1124

build_tools/spec/changelog_verifier_spec.rb

@@ -47,7 +47,7 @@ def log_paths
 describe "ensures CHANGELOG.md has parsable entries" do
 
   let(:skip_pattern) { /(------------------\n|Unreleased Changes\n|\d\.\d+\.\d.*)/ }
-  let(:entry_pattern) { /(\*\sFeature\s-\s[\w:]+|\*\sIssue\s-\s[\w:]+|\s+.+)/ }
+  let(:entry_pattern) { /(\*\sFeature\s-\s\w+|\*\sIssue\s-\s\w+)/ }
 
   log_paths.each do |path|
     it "#{path} has parsable changlog entries" do