refactor: i18n en.json corrections

Signed-off-by: Raju Udava <86527202+dstala@users.noreply.github.com>

packages/nc-gui/lang/en.json

@@ -33,7 +33,7 @@
     "hideMenu": "Hide menu",
     "addAll": "Add all",
     "removeAll": "Remove all",
-    "signUp": "Sign Up",
+    "signUp": "SIGN UP",
     "signIn": "SIGN IN",
     "signOut": "Sign Out",
     "required": "Required",
@@ -131,7 +131,7 @@
     "appStore": "App Store",
     "team&auth": "Team & Auth",
     "rolesUserMgmt": "Roles & Users Management",
-    "userMgmt": "Users Management",
+    "userMgmt": "Users management",
     "apiTokenMgmt": "API Tokens Management",
     "rolesMgmt": "Roles Management",
     "projMeta": "Project Metadata",