Fix a typo

java/res/values-af/strings.xml

java/res/values-am/strings.xml

java/res/values-ar/strings.xml

java/res/values-be/strings.xml

java/res/values-bg/strings.xml

java/res/values-ca/strings.xml

java/res/values-cs/strings.xml

java/res/values-da/strings.xml

java/res/values-de/strings.xml

java/res/values-el/strings.xml

java/res/values-en-rGB/strings.xml

java/res/values-es-rUS/strings.xml

java/res/values-es/strings.xml

java/res/values-et/strings.xml

java/res/values-fa/strings.xml

java/res/values-fi/strings.xml

java/res/values-fr/strings.xml

java/res/values-hi/strings.xml

java/res/values-hr/strings.xml

java/res/values-hu/strings.xml