PHPC-1961: Sync BSON corpus tests for top.json decodeErrors fixes (#1257)

Synced with mongodb/specifications@5fad277

Author: jmikola

tests/bson-corpus/top-parseError-003.phpt

@@ -10,7 +10,7 @@ DO NOT EDIT THIS FILE
 require_once __DIR__ . '/../utils/basic.inc';
 
 throws(function() {
-    fromJSON('{"x" : {"$regularExpression" : { "pattern": 42, "$options" : ""}}}');
+    fromJSON('{"x" : {"$regularExpression" : { "pattern": 42, "options" : ""}}}');
 }, 'MongoDB\Driver\Exception\UnexpectedValueException');
 
 ?>

tests/bson-corpus/top-parseError-004.phpt

@@ -10,7 +10,7 @@ DO NOT EDIT THIS FILE
 require_once __DIR__ . '/../utils/basic.inc';
 
 throws(function() {
-    fromJSON('{"x" : {"$regularExpression" : { "pattern": "a", "$options" : 0}}}');
+    fromJSON('{"x" : {"$regularExpression" : { "pattern": "a", "options" : 0}}}');
 }, 'MongoDB\Driver\Exception\UnexpectedValueException');
 
 ?>