fix block should be blocks, fixes #488

Author: DaanV2

packages/bedrock-commands/src/data/vanilla/execute/subcommands.ts

@@ -339,7 +339,7 @@ export const executeSubCommands: CommandContainer = {
       permission_level: 1,
       parameters: [
         { text: 'unless', type: ParameterType.keyword, required: true },
-        { text: 'block', type: ParameterType.keyword, required: true },
+        { text: 'blocks', type: ParameterType.keyword, required: true },
         { text: 'begin x', type: ParameterType.coordinate, required: true },
         { text: 'begin y', type: ParameterType.coordinate, required: true },
         { text: 'begin z', type: ParameterType.coordinate, required: true },