chore: update project for Go 1.23 compatibility and documentation fixes

- Update Go version requirement from 1.22 to 1.23 in README.md
- Remove superfluous `$` from example command in README.md
- Update warning message to reflect new Go version requirement in debug.go
- Update test assertion to reflect new Go version requirement in debug_test.go

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

README.md

@@ -30,7 +30,7 @@ If you need performance and good productivity, you will love Gin.
 
 ### Prerequisites
 
-Gin requires [Go](https://go.dev/) version [1.22](https://go.dev/doc/devel/release#go1.22.0) or above.
+Gin requires [Go](https://go.dev/) version [1.23](https://go.dev/doc/devel/release#go1.23.0) or above.
 
 ### Getting Gin
 
@@ -73,7 +73,7 @@ func main() {
 To run the code, use the `go run` command, like:
 
 ```sh
-$ go run example.go
+go run example.go
 ```
 
 Then visit [`0.0.0.0:8080/ping`](http://0.0.0.0:8080/ping) in your browser to see the response!

debug.go

@@ -78,7 +78,7 @@ func getMinVer(v string) (uint64, error) {
 
 func debugPrintWARNINGDefault() {
 	if v, e := getMinVer(runtime.Version()); e == nil && v < ginSupportMinGoVer {
-		debugPrint(`[WARNING] Now Gin requires Go 1.22+.
+		debugPrint(`[WARNING] Now Gin requires Go 1.23+.
 
 `)
 	}

debug_test.go

@@ -106,7 +106,7 @@ func TestDebugPrintWARNINGDefault(t *testing.T) {
 	})
 	m, e := getMinVer(runtime.Version())
 	if e == nil && m < ginSupportMinGoVer {
-		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.22+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
+		assert.Equal(t, "[GIN-debug] [WARNING] Now Gin requires Go 1.23+.\n\n[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	} else {
 		assert.Equal(t, "[GIN-debug] [WARNING] Creating an Engine instance with the Logger and Recovery middleware already attached.\n\n", re)
 	}