fix: add support for url-encoded vector-sink config values

We additionally force-replace \u0026 with an ampersand to ensure we properly support & in config values (such as for URIs).

plugins/logs/functions.go

@@ -1,6 +1,7 @@
 package logs
 
 import (
+	"bytes"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -217,6 +218,8 @@ func writeVectorConfig() error {
 		return err
 	}
 
+	b = bytes.Replace(b, []byte("\\u0026"), []byte("&"), -1)
+
 	vectorConfig := filepath.Join(common.MustGetEnv("DOKKU_LIB_ROOT"), "data", "logs", "vector.json")
 	if err := common.WriteSliceToFile(vectorConfig, []string{string(b)}); err != nil {
 		return err