Update state machine to support StringMatches (#3705)

Author: kddejong

src/cfnlint/data/schemas/other/step_functions/statemachine.json

@@ -109,6 +109,9 @@
       "StringLessThanPath": {
        "type": "string"
       },
+      "StringMatches": {
+       "type": "string"
+      },
       "TimestampEquals": {
        "type": "string"
       },
@@ -175,6 +178,7 @@
       "StringLessThanPath",
       "StringLessThanEquals",
       "StringLessThanEqualsPath",
+      "StringMatches",
       "TimestampEquals",
       "TimestampEqualsPath",
       "TimestampGreaterThan",