style(*): fix lint issues

internal/analyzer/analyzer.go

@@ -50,7 +50,7 @@ func New(format string, config config.ChangelogConfig) (*Analyzer, error) {
 		log.Debugf("Commit format set to angular")
 		analyzer.analyzeCommit = newAngular()
 	default:
-		return nil, fmt.Errorf("Invalid commit format: %s", format)
+		return nil, fmt.Errorf("invalid commit format: %s", format)
 	}
 	return analyzer, nil
 

internal/analyzer/angular.go

@@ -107,6 +107,6 @@ func (a *angular) analyze(commit gitutil.Commit, rule Rule) (AnalyzedCommit, boo
 		}
 	}
 	log.Tracef("%s does not match %s, skip", commit.Message, rule.Tag)
-	return analyzed, false, fmt.Errorf("Not found")
+	return analyzed, false, fmt.Errorf("not found")
 
 }