Update PULL_REQUEST_TEMPLATE.md

.github/PULL_REQUEST_TEMPLATE.md

@@ -32,9 +32,9 @@ Subsections:
 - Resources
 - Gradle Plugin
 -->
-> Section - Subsection
+### Section - Subsection
 - Describe a change for adding it to https://github.com/JetBrains/compose-multiplatform/blob/master/CHANGELOG.md
 - _(prerelease fix)_ Fix some bug that introduced in a prerelease version (dev/beta). It will be included in a dev/beta changelog, but excluded from a stable changelog
 
-> Section - Subsection
+### Section - Subsection
 - Describe another change if needed