Update run_ptl_script.py

(cherry picked from commit 4e8cf85)

Author: williamFalcon

docs/source-app/levels/basic/hello_components/run_ptl_script.py

@@ -1,5 +1,5 @@
 # app.py
-# !curl https://bit.ly/demoLightningScriptpy -o pl_boring_script.py
+# !curl https://raw.githubusercontent.com/Lightning-AI/lightning/master/examples/app_multi_node/pl_boring_script.py -o pl_boring_script.py
 import lightning as L
 from lightning.app.components.training import LightningTrainerScript