fix: use math/rand/v2 package from Go 1.22

This new package pre-seeds the global rand source on every process start
so we don't need to maintain our own rand.Source variable.

task_test.go

@@ -6,7 +6,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"math/rand"
+	rand "math/rand/v2"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -30,8 +30,6 @@ import (
 	"github.com/go-task/task/v3/taskfile/ast"
 )
 
-var random = rand.New(rand.NewSource(time.Now().UnixNano()))
-
 func init() {
 	_ = os.Setenv("NO_COLOR", "1")
 }
@@ -1127,7 +1125,7 @@ func TestIncludesRemote(t *testing.T) {
 
 					for k, task := range tasks {
 						t.Run(task, func(t *testing.T) {
-							expectedContent := fmt.Sprint(random.Int63())
+							expectedContent := fmt.Sprint(rand.Int64())
 							t.Setenv("CONTENT", expectedContent)
 
 							outputFile := fmt.Sprintf("%d.%d.txt", i, k)