fix: small typo in the getting started docs (#4954)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR focuses on modifying the initialization of `callbackFunctions` and `fallbackFunctions` in the `create-module-contract` function to use dynamic arrays instead of single instances.

### Detailed summary
- Changed `config.callbackFunctions` from a single `CallbackFunction` to a dynamic array of `CallbackFunction` with size 1.
- Changed `config.fallbackFunctions` from a single `FallbackFunction` to a dynamic array of `FallbackFunction` with size 2.

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Author: GWSzeto

apps/portal/src/app/contracts/modular-contracts/get-started/create-module-contract/page.mdx

@@ -363,8 +363,8 @@ export const metadata = createMetadata({
            override
            returns (ModuleConfig memory config)
        {
-           config.callbackFunctions = new CallbackFunction ;
-           config.fallbackFunctions = new FallbackFunction ;
+           config.callbackFunctions = new CallbackFunction[](1);
+           config.fallbackFunctions = new FallbackFunction[](2);
 
            config.callbackFunctions[0] = CallbackFunction(
                this.beforeIncrement.selector