fix: trim final newline on release note

Follow-up #544

cli/app/upgrade.go

@@ -3,6 +3,7 @@ package app
 import (
 	"context"
 	"fmt"
+	"strings"
 
 	"coopcloud.tech/abra/cli/internal"
 	"coopcloud.tech/abra/pkg/app"
@@ -335,6 +336,11 @@ func getReleaseNotes(
 			}
 
 			if note != "" {
+				// NOTE(d1): trim any final newline on the end of the note itself before
+				//           we manually handle newlines (for multiple release notes and
+				//           ensuring space between the warning messages)
+				note = strings.TrimSuffix(note, "\n")
+
 				*upgradeReleaseNotes += fmt.Sprintf("%s\n", note)
 			}
 		}