Fix release notes never being included in Slack notifications (#796)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Vetle444 <35739538+Vetle444@users.noreply.github.com>

Author: Copilot

build/AwesomeBuildsystem/Core/VersionUtil.csx

@@ -68,7 +68,7 @@ public static class VersionUtil
 
         foreach (var line in lines)
         {
-            if (!foundHeader && (changelogHeader == null || line.Contains(changelogHeader ?? "## Version")))
+            if (!foundHeader && (changelogHeader == null || Regex.IsMatch(line, changelogHeader)))
             {
                 foundHeader = true;
                 continue;

build/build.csx

@@ -400,7 +400,7 @@ TaskRunner
         var ipaFilePath = outputFiles.FirstOrDefault(f => f.EndsWith(".ipa"));
         var aabFilePath = outputFiles.FirstOrDefault(f => f.EndsWith(".aab"));
         var version = Utils.GetChangelogVersion(RootDirectory, ChangelogHeaderPrefix, VersionPattern);
-        var releaseNote = Utils.GetChangelogNotes(RootDirectory, $"{ChangelogHeaderPrefix}{VersionPattern}] - [0-9]+-[0-9]+-[0-9]+");
+        var releaseNote = Utils.GetChangelogNotes(RootDirectory, $"## \\[{VersionPattern}\\]");
         var isIOSDelivery = ipaFilePath != null;
         var isAndroidDelivery = aabFilePath != null;