feat: change the description and links in the 'log/slog' node (#5798)

* change the description and links in the 'log/slog' node
---------

Co-authored-by: dsh <daniel.s.holdsworth@gmail.com>

src/data/roadmaps/golang/content/105-go-logging/102-log-slog.md

@@ -1,5 +1,10 @@
 # log/slog
 
-The `log` package is the standard logging package in Go. It provides a simple logging API that can be used to log messages to the console or to a file.
+The `log` and `log/slog` (since go 1.21) packages are the standard logging packages in Go. These packages provides a simple logging API that can be used to log messages to the console or to a file.
 
-Learn more about the `log` package in the [official documentation](https://pkg.go.dev/log).
+Visit the following resources to learn more:
+
+- [Official Documentation: log](https://pkg.go.dev/log)
+- [Official Documentation: log/slog](https://pkg.go.dev/log/slog) `(since go 1.21)`
+- [Go Blog: Structured Logging with slog](https://go.dev/blog/slog)
+- [Go by Example: Logging](https://gobyexample.com/logging)