update procedure following modification GPT Chat (#108)

* update procedure following modification GPT Chat

* modif text create secret

Author: Otijom

source/glpiai/images/glpiai-3.png

@@ -2,11 +2,11 @@ Create a secret
 ----------------
 
 - From this URL https://platform.openai.com/api-keys
-- Click on **Create a new secret**
+- Click on **Create a new key**
 
 .. figure:: images/glpiai-3.png
    :alt: create secret
-   :scale: 55 %
+   :scale: 38 %
 
 - Give a name to your secret
 - Click on **Create secret key**