docs: fix typo in material-experimental/README.md (#22607)

Author: Splaktar

src/material-experimental/README.md

@@ -41,7 +41,7 @@ component by following these steps:
   export class MyModule {}
 ```
 
-4. Add use the components just as you would the normal Angular Material components. For example,
+4. Use the components just as you would the normal Angular Material components. For example,
 the checkbox:
 ```html
   <mat-checkbox [checked]="isChecked">Check me</mat-checkbox>