chore(lambda): inline code size limit is 4MB (#30773)

### Issue # (if applicable)

Closes #30761.

### Checklist
- [x] My code adheres to the [CONTRIBUTING
GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and
[DESIGN
GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license*

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Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

packages/aws-cdk-lib/aws-appsync/lib/code.ts

@@ -35,7 +35,7 @@ export abstract class Code {
   /**
    * Inline code for AppSync function
    * @returns `InlineCode` with inline code.
-   * @param code The actual handler code (limited to 4KiB)
+   * @param code The actual handler code (the resulting zip file cannot exceed 4MB)
    */
   public static fromInline(code: string): InlineCode {
     return new InlineCode(code);

packages/aws-cdk-lib/aws-lambda/lib/code.ts

@@ -45,7 +45,7 @@ export abstract class Code {
   /**
    * Inline code for Lambda handler
    * @returns `LambdaInlineCode` with inline code.
-   * @param code The actual handler code (limited to 4KiB)
+   * @param code The actual handler code (the resulting zip file cannot exceed 4MB)
    */
   public static fromInline(code: string): InlineCode {
     return new InlineCode(code);