Update README with CI badge and content revisions

Author: nexapytech

README.md

@@ -1,4 +1,5 @@
-![CI](https://github.com/nexapytech/expense-tracker-api/actions/workflows/python-tests.yml/badge.svg)
+![CI](https://github.com/nexapytech/expense-tracker-api/actions/workflows/ci.yml/badge.svg)
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 # Nexpenz API  Backend for Personal Finance App
@@ -89,3 +90,4 @@ docker run -p 8000:8000 nexpenz
 
 
 
+