Fixed a couple of tsserver unit tests

Author: JoshuaKGoldberg

src/testRunner/unittests/tsserver/openFile.ts

@@ -175,7 +175,7 @@ bar();`
                         file,
                         syntax: [],
                         semantic: [
-                            createDiagnostic(locationOfY.start, locationOfY.end, Diagnostics.Type_0_is_not_assignable_to_type_1, ["10", "string"]),
+                            createDiagnostic(locationOfY.start, locationOfY.end, Diagnostics.Type_0_is_not_assignable_to_type_1, ["number", "string"]),
                         ],
                         suggestion: []
                     },

src/testRunner/unittests/tsserver/projectReferenceErrors.ts

@@ -166,7 +166,7 @@ fnErr();
                             { line: 6, offset: 12 },
                             { line: 6, offset: 13 },
                             Diagnostics.Type_0_is_not_assignable_to_type_1,
-                            ["10", "string"],
+                            ["number", "string"],
                             "error",
                         )
                     ],
@@ -235,7 +235,7 @@ fnErr();
                             { line: 6, offset: 5 },
                             { line: 6, offset: 6 },
                             Diagnostics.Type_0_is_not_assignable_to_type_1,
-                            ["10", "string"],
+                            ["number", "string"],
                             "error",
                         )
                     ],