chore(go): refactor codebase and update dependencies

- Remove the toolchain specification for go1.23.1

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Author: appleboy

go.mod

@@ -2,8 +2,6 @@ module github.com/gin-contrib/pprof
 
 go 1.21.0
 
-toolchain go1.23.1
-
 require github.com/gin-gonic/gin v1.10.0
 
 require (