docs: update issue with GitHub issue number #243

- Rename file to include issue number
- Update issue reference from TBD to #243

Author: josecelano

…roduce-secret-type-for-sensitive-data.md …roduce-secret-type-for-sensitive-data.mddocs/issues/introduce-secret-type-for-sensitive-data.md renamed to docs/issues/243-introduce-secret-type-for-sensitive-data.md docs/issues/introduce-secret-type-for-sensitive-data.md renamed to docs/issues/243-introduce-secret-type-for-sensitive-data.md

@@ -1,6 +1,6 @@
 # Introduce Secret Type for Sensitive Data
 
-**Issue**: #TBD
+**Issue**: #243
 **Related**: [ADR: Secrecy Crate for Sensitive Data](../decisions/secrecy-crate-for-sensitive-data.md)
 
 ## Overview