docs: add elevation and square prop documentation to PropTypes

Author: techcodie

packages/mui-material/src/Alert/Alert.js

@@ -334,6 +334,12 @@ Alert.propTypes /* remove-proptypes */ = {
     closeButton: PropTypes.object,
     closeIcon: PropTypes.object,
   }),
+  /**
+   * Shadow depth, corresponds to `dp` in the spec.
+   * It accepts values between 0 and 24 inclusive.
+   * @default 0
+   */
+  elevation: PropTypes.number,
   /**
    * Override the icon displayed before the children.
    * Unless provided, the icon is mapped to the value of the `severity` prop.

packages/mui-material/src/MobileStepper/MobileStepper.js

@@ -269,6 +269,12 @@ MobileStepper.propTypes /* remove-proptypes */ = {
    * @ignore
    */
   className: PropTypes.string,
+  /**
+   * Shadow depth, corresponds to `dp` in the spec.
+   * It accepts values between 0 and 24 inclusive.
+   * @default 0
+   */
+  elevation: PropTypes.number,
   /**
    * Props applied to the `LinearProgress` element.
    * @deprecated Use `slotProps.progress` instead. This prop will be removed in a future major release. See [Migrating from deprecated APIs](/material-ui/migration/migrating-from-deprecated-apis/) for more details.
@@ -303,6 +309,11 @@ MobileStepper.propTypes /* remove-proptypes */ = {
     progress: PropTypes.elementType,
     root: PropTypes.elementType,
   }),
+  /**
+   * If `false`, rounded corners are disabled.
+   * @default true
+   */
+  square: PropTypes.bool,
   /**
    * The total steps.
    */

packages/mui-material/src/SnackbarContent/SnackbarContent.js

@@ -112,6 +112,12 @@ SnackbarContent.propTypes /* remove-proptypes */ = {
    * @ignore
    */
   className: PropTypes.string,
+  /**
+   * Shadow depth, corresponds to `dp` in the spec.
+   * It accepts values between 0 and 24 inclusive.
+   * @default 6
+   */
+  elevation: PropTypes.number,
   /**
    * The message to display.
    */