fix workflow custom variables render (#4615)

Signed-off-by: Patrick Zhao <zhaoyu@koderover.com>

Author: PetrusZ

pkg/microservice/aslan/config/consts.go

@@ -752,16 +752,16 @@ const (
 )
 
 const (
-	VariableRegEx             = `{{\.([\p{L}\d-]+(\.[\p{L}\d-]+)*.)}}`
-	VariableOutputRegEx       = `{{\.([\p{L}\d-]+(\.[\p{L}\d-]+)*).output.[\p{L}\d-]+}}`
-	ReplacedTempVariableRegEx = `TEMP_PLACEHOLDER_([\p{L}\d-]+(\.[\p{L}\d-]+)*)`
+	VariableRegEx             = `{{\.([\p{L}\d-]+(\.[\p{L}\d_-]+)*.)}}`
+	VariableOutputRegEx       = `{{\.([\p{L}\d-]+(\.[\p{L}\d_-]+)*).output.[\p{L}\d_-]+}}`
+	ReplacedTempVariableRegEx = `TEMP_PLACEHOLDER_([\p{L}\d-]+(\.[\p{L}\d_-]+)*)`
 )
 
 type ValueMergeStrategy string
 
 const (
 	ValueMergeStrategyReuseValue ValueMergeStrategy = "reuse-values"
-	ValueMergeStrategyOverride   ValueMergeStrategy= "override"
+	ValueMergeStrategyOverride   ValueMergeStrategy = "override"
 )
 
 type YAMLMergeStrategy string