Update toml-test test cases from upstream (#456)

Author: arp242

.github/workflows/test.yml

@@ -5,7 +5,7 @@
     "test": {
       "strategy": {
         "matrix": {
-          "go-version": ["1.18.x", "1.24.x"],
+          "go-version": ["1.18.x", "1.25.x"],
           "os":         ["ubuntu-latest", "macos-latest", "windows-latest"]
         }
       },

error_test.go

@@ -18,23 +18,23 @@ func TestErrorPosition(t *testing.T) {
 	tests := []struct {
 		test, err string
 	}{
-		{"array/missing-separator-2.toml", `
+		{"array/missing-separator-02.toml", `
 toml: error: expected a comma (',') or array terminator (']'), but got '2'
 
 At line 1, column 13:
 
       1 | wrong = [ 1 2 3 ]
                       ^`},
 
-		{"array/no-close-1.toml", `
+		{"array/no-close-01.toml", `
 toml: error: expected a comma (',') or array terminator (']'), but got end of file
 
-At line 1, column 23:
+At line 1, column 24:
 
-      1 | no-close-1 = [ 1, 2, 3
-                                ^`},
+      1 | no-close-01 = [ 1, 2, 3
+                                 ^`},
 
-		{"array/tables-2.toml", `
+		{"array/tables-02.toml", `
 toml: error: Key 'fruit.variety' has already been defined.
 
 At line 9, column 4-8:
@@ -52,15 +52,15 @@ At line 2, column 5-15:
       2 | d = 2006-01-30T
               ^^^^^^^^^^^`},
 
-		{"key/without-value-1.toml", `
+		{"key/without-value-01.toml", `
 toml: error: expected '.' or '=', but got '\n' instead
 
 At line 1, column 4:
 
       1 | key
              ^`},
 		// Position looks wonky, but test has trailing space, so it's correct.
-		{"key/without-value-2.toml", `
+		{"key/without-value-02.toml", `
 toml: error: expected value but found '\n' instead
 
 At line 1, column 7: