increase max speed to 15

Project/Assets/ML-Agents/Examples/Crawler/Scenes/CrawlerDynamicTarget.unity

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+      value: 15
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+      propertyPath: m_TargetWalkingSpeed
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+      propertyPath: m_TargetWalkingSpeed
+      value: 15
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Project/Assets/ML-Agents/Examples/Crawler/Scripts/CrawlerAgent.cs

 
     public CrawlerAgentBehaviorType typeOfCrawler;
 
+    const float m_maxWalkingSpeed = 15; //The max walking speed
+
     //Crawler Brains
     //A different brain will be used depending on the CrawlerAgentBehaviorType selected
     [Header("NN Models")]
     public NNModel crawlerStVSBrain;
 
     [Header("Walk Speed")]
-    [Range(0.1f, 10)]
+    [Range(0.1f, m_maxWalkingSpeed)]
-    private float m_TargetWalkingSpeed = 10;
+    private float m_TargetWalkingSpeed = m_maxWalkingSpeed;
 
 
     public float TargetWalkingSpeed // property
     }
 
-    const float m_maxWalkingSpeed = 10; //The max walking speed
 
     //Should the agent sample a new goal velocity each episode?
     //If true, walkSpeed will be randomly set between zero and m_maxWalkingSpeed in OnEpisodeBegin()