docs(guide): reverse body-1 and body-2 description

Reverse the description of body-1 and body-2 in the documentation for 'Typography levels'. Looking at how mat-body-1 (mat-h4) and mat-body-2 (mat-body) classes are applied, it seems that the descriptions in the documentation are reversed.

BREAKING CHANGE: the description for body-1 and body-2 has changed

Closes #26251

Author: DrVickie8

guides/typography.md

@@ -51,8 +51,8 @@ table below.
 | `headline-6`     | Section heading corresponding to the `<h2>` tag.                            |
 | `subtitle-1`     | Section heading corresponding to the `<h3>` tag.                            |
 | `subtitle-2`     | Section heading corresponding to the `<h4>` tag.                            |
-| `body-1`         | Base body text.                                                             |
-| `body-2`         | Bolder body text.                                                           |
+| `body-1`         | Bolder body text.                                                             |
+| `body-2`         | Base body text.                                                           |
 | `caption`        | Smaller body and hint text.                                                 |
 | `button`         | Buttons and anchors.                                                        |