Fix convertUnicodeToAscii text utility method

app/assets/javascripts/lib/utils/text_utility.js

@@ -283,7 +283,7 @@ const unicodeConversion = [
   [/[ÌÍÎÏĨĪĬĮİ]/g, 'I'],
   [/[Ððĥħ]/g, 'h'],
   [/[ÑŃŅŇʼn]/g, 'N'],
-  [/[ÒÓÔÕÖØŌŎŐ]/g, 'O'],
+  [/[ÒÓÔÕØŌŎŐ]/g, 'O'],
   [/[ÙÚÛŨŪŬŮŰŲ]/g, 'U'],
   [/[ÝŶŸ]/g, 'Y'],
   [/[Þñþńņň]/g, 'n'],
@@ -293,7 +293,7 @@ const unicodeConversion = [
   [/[çćĉċč]/g, 'c'],
   [/[èéêëēĕėęě]/g, 'e'],
   [/[ìíîïĩīĭį]/g, 'i'],
-  [/[òóôõöøōŏő]/g, 'o'],
+  [/[òóôõøōŏő]/g, 'o'],
   [/[ùúûũūŭůűų]/g, 'u'],
   [/[ýÿŷ]/g, 'y'],
   [/[ĎĐ]/g, 'D'],

spec/frontend/lib/utils/text_utility_spec.js

@@ -218,10 +218,11 @@ describe('text_utility', () => {
 
     it('replaces Unicode characters', () => {
       expect(textUtils.convertUnicodeToAscii('Dĭd söméònê äšk fœŕ Ůnĭċődę?')).toBe(
-        'Did someone aesk foer Unicode?',
+        'Did soemeone aesk foer Unicode?',
       );
 
       expect(textUtils.convertUnicodeToAscii("Jürgen's Projekt")).toBe("Juergen's Projekt");
+      expect(textUtils.convertUnicodeToAscii('öäüÖÄÜ')).toBe('oeaeueOeAeUe');
     });
   });