Fixes state interpolation when using {{ output }} (#5039)

* Fixes the lossy-replace when a new state assignment contains the {{ output }} variable

* Replaces replace with replaceAll

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Co-authored-by: Corentin <corentin.hoareau@sogeti.com>

packages/components/nodes/agentflow/ExecuteFlow/ExecuteFlow.ts

@@ -225,7 +225,7 @@ class ExecuteFlow_Agentflow implements INode {
             if (newState && Object.keys(newState).length > 0) {
                 for (const key in newState) {
                     if (newState[key].toString().includes('{{ output }}')) {
-                        newState[key] = resultText
+                        newState[key] = newState[key].replaceAll('{{ output }}', resultText)
                     }
                 }
             }