fix typo in message

Author: vladima

src/compiler/diagnosticMessages.json

@@ -2292,7 +2292,7 @@
         "category": "Error",
         "code": 5062
     },
-    "Substututions for patterns '{0}' should be an array.": {
+    "Substututions for pattern '{0}' should be an array.": {
         "category": "Error",
         "code": 5063
     },

src/compiler/program.ts

@@ -1999,7 +1999,7 @@ namespace ts {
                         }
                     }
                     else {
-                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substututions_for_patterns_0_should_be_an_array, key));
+                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }

tests/baselines/reference/pathsValidation1.errors.txt

@@ -1,6 +1,6 @@
-error TS5063: Substututions for patterns '*' should be an array.
+error TS5063: Substututions for pattern '*' should be an array.
 
 
-!!! error TS5063: Substututions for patterns '*' should be an array.
+!!! error TS5063: Substututions for pattern '*' should be an array.
 ==== tests/cases/compiler/a.ts (0 errors) ====
     let x = 1;