strings: renaming "check-for-updates" to simply "updates"

which is more appropriate

Signed-off-by: sunilpaulmathew <sunil.kde@gmail.com>

app/src/main/res/values/strings.xml

@@ -108,7 +108,7 @@
     <string name="settings">Settings</string>
     <string name="about">About</string>
     <string name="contributors">Contributors</string>
-    <string name="update">Check for Update</string>
+    <string name="update">Updates</string>
     <string name="help" translatable="false">FAQ</string>
 
     <!-- Overall -->