Fix changelog format for Markdown linter (#16188)

Author: straight-shoota

scripts/github-changelog.cr

@@ -338,7 +338,7 @@ class ChangelogEntry
 
   def to_s(io : IO)
     if sub_topic = pr.sub_topic
-      io << "*(" << sub_topic << ")* "
+      io << "_(" << sub_topic << ")_ "
     end
     if pr.labels.includes?("security")
       io << "**[security]** "
@@ -454,8 +454,7 @@ TOPIC_ORDER = %w[lang stdlib compiler tools other]
 puts "## [#{milestone.title}] (#{milestone.release_date.try(&.to_s("%F")) || "unreleased"})"
 if description = milestone.description.presence
   puts
-  print "_", description
-  puts "_"
+  puts description
 end
 puts
 puts "[#{milestone.title}]: https://github.com/#{repository}/releases/#{milestone.title}"

scripts/release-update.sh

@@ -25,9 +25,9 @@ rm -f src/SOURCE_DATE_EPOCH
 # Truncate CHANGELOG.md
 sed -i -E '/^## \[/,/^## Previous Releases/{/^## Previous Releases/!d}' CHANGELOG.md
 
-if ! grep -q https://github.com/crystal-lang/crystal/blob/release/${CRYSTAL_VERSION%.*}/CHANGELOG.md CHANGELOG.md; then
+if ! grep -q "https://github.com/crystal-lang/crystal/blob/release/${CRYSTAL_VERSION%.*}/CHANGELOG.md" CHANGELOG.md; then
   sed -i -E "/For information on prior releases/{ N;a\
-  * [${CRYSTAL_VERSION%.*}](https://github.com/crystal-lang/crystal/blob/release/${CRYSTAL_VERSION%.*}/CHANGELOG.md)
+  - [${CRYSTAL_VERSION%.*}](https://github.com/crystal-lang/crystal/blob/release/${CRYSTAL_VERSION%.*}/CHANGELOG.md)
   }" CHANGELOG.md
 fi