Fix typos in apps/ subdirectory

Found via `codespell -q 3 -S l10n,./apps/files_external/3rdparty -L adn,ba,boxs,keypair,jus,optionel,ressource,tabel ./apps/`

Signed-off-by: luz paz <luzpaz@github.com>

Author: luz paz

apps/cloud_federation_api/README.md

@@ -1,2 +1,2 @@
 # cloud_federation_api
-The cloud federation API allows to share information like files, contacts, calendars, incoming calls, etc accross Nextcloud instances
+The cloud federation API allows to share information like files, contacts, calendars, incoming calls, etc across Nextcloud instances

apps/comments/src/activitytabviewplugin.js

@@ -31,7 +31,7 @@
 		 *
 		 * @param {OCA.Activity.ActivityModel} model for this activity
 		 * @param {jQuery} $el jQuery handle for this activity
-		 * @param {string} view The view that displayes this activity
+		 * @param {string} view The view that displays this activity
 		 */
 		prepareModelForDisplay(model, $el, view) {
 			if (model.get('app') !== 'comments' || model.get('type') !== 'comments') {