Update models.sh

Author: logankilpatrick

samples/rest/models.sh

@@ -2,10 +2,10 @@ set -eu
 
 echo "[START models_list]"
 # [START models_list]
-curl https://generativelanguage.googleapis.com/v1beta/models?key=$GOOGLE_API_KEY
+curl https://generativelanguage.googleapis.com/v1beta/models?key=$GEMINI_API_KEY
 # [END models_list]
 
 echo "[START models_get]"
 # [START models_get]
-curl https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash?key=$GOOGLE_API_KEY
+curl https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash?key=$GEMINI_API_KEY
 # [END models_get]