fix(i18n): Add missing comma in en.json

Author: ChernegaSergiy

public/locales/en.json

@@ -33,7 +33,7 @@
     "step.intConversionDetails": "Converting integer part {integer} from base {fromBase} to decimal:\n{details}Sum: {sum}",
     "step.fracConversionDetails": "Converting fractional part {fractional} from base {fromBase} to decimal:\n{details}Sum: {sum}",
     "step.intToBaseDetails": "Converting integer part {integer} to base {toBase}:\n{details}Result: {result} (read remainders from bottom to top)",
-    "step.fracToBaseDetails": "Converting fractional part {fractional} to base {toBase}:\n{details}Result: {result}"
+    "step.fracToBaseDetails": "Converting fractional part {fractional} to base {toBase}:\n{details}Result: {result}",
     "step.finalResult": "Result: {result}",
     "step.remainder": "remainder",
     "step.integerPart": "integer part"