Rename cod-btn into cod-button.

frontend/src/app/components/publication-edition/publication-edition.component.html

@@ -122,7 +122,7 @@
     <footer>
         <app-submit-button [requestPending]="!!(isSaving$ | async)" i18n>Save</app-submit-button>
         <button type="button"
-                class="cod-btn secondary" 
+                class="cod-button secondary" 
                 (click)="goPreviousLocation()" 
                 matRipple 
                 i18n>