Use go tag for 1.26

.mise.toml

@@ -20,7 +20,7 @@ run = "go build"
 description = "Update dependencies"
 run = [
     "go get -u",
-    "go mod tidy -go=1.25"
+    "go mod tidy -go=1.26"
 ]
 
 [tasks.lint]

go.mod

@@ -1,6 +1,6 @@
 module github.com/9seconds/mtg/v2
 
-go 1.25
+go 1.26
 
 require (
 	github.com/OneOfOne/xxhash v1.2.8