Make sure build info works properly for messages with more than one line

Test on this commit

Author: mathbunnyru

tagging/manifests/build_info.py

@@ -53,8 +53,8 @@ def markdown_piece(config: BuildInfoConfig) -> MarkdownPiece:
             - Git commit message:
 
             ```text
-            {commit_message}
+            {{message}}
             ```"""
-        )
+        ).format(message=commit_message)
 
         return MarkdownPiece(title="## Build Info", sections=[build_info])