Add noMatchingExersieFound message entry

This message is to be displayed when no exercise items are found.

Fixed typo

Author: sheyaln

lib/l10n/app_ar.arb

@@ -420,6 +420,10 @@
   "@searchExercise": {
     "description": "Label on set form. Selected exercises are added to the set"
   },
+  "noMatchingExerciseFound": "لم نجد تمرين بهذا الأسم",
+  "@noMatchingExerciseFound": {
+    "description": "Message returned if no exercise match the searched string"
+  },
   "registerInstead": "ليس لديك حساب ؟ سجّل الان",
   "@registerInstead": {},
   "aboutMastodonTitle": "Mastodon",

lib/l10n/app_en.arb

@@ -122,6 +122,10 @@
   "@searchExercise": {
     "description": "Label on set form. Selected exercises are added to the set"
   },
+  "noMatchingExerciseFound": "No matching exercises found",
+  "@noMatchingExerciseFound": {
+    "description": "Message returned if no exercises match the searched string"
+  },
   "searchNamesInEnglish": "Also search for names in English",
   "supersetWith": "superset with",
   "@supersetWith": {