Update linguist-language (#12994)

* Install new `linguist-language`

* Remove `.mts` and `.cts`

* Update tests

package.json

@@ -62,7 +62,7 @@
     "json5": "2.2.1",
     "leven": "4.0.0",
     "lines-and-columns": "2.0.3",
-    "linguist-languages": "7.15.0",
+    "linguist-languages": "7.21.0",
     "mem": "9.0.2",
     "meriyah": "4.2.1",
     "micromatch": "4.0.5",