Update README.md by removing GitHub badge

Removed an unnecessary GitHub badge and updated the last updated date.

Author: brown9804

0_Azure/3_AzureAI/AIFoundry/demos/2_AIFoundrySDLCStrategy/README.md

@@ -2,7 +2,6 @@
 
 Costa Rica
 
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 [brown9804](https://github.com/brown9804)