Update ISSUE_TEMPLATE

Author: lassekongo83

.github/ISSUE_TEMPLATE/template.yml

@@ -15,13 +15,13 @@ body:
       options:
         - label: I have made sure that I do not have multiple versions of the theme installed. Only one version should be installed in either `~/.local/share/themes` or `/usr/share/themes`
           required: true
-        - label: The files `~/.config/gtk-3.0/gtk.css` and `~/.config/gtk-4.0/gtk.css` does not exist. (Backup and remove those files and restart any apps.)
+        - label: The files `~/.config/gtk-3.0/gtk.css` and `~/.config/gtk-4.0/gtk.css` do not exist. (Backup and remove those files and restart any apps.)
           required: true
         - label: I've made sure that the issue did not go away by restarting apps or by logging out and in again.
           required: true
-        - label: By running the command `env` I've made sure that there is no environment variable called `GTK_THEME`
-          required: false
-        - label: Dark theme not applied on some apps? Did you try to run `gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark'` ?
+        - label: By running the command `echo $GTK_THEME` I've made sure that there is no environment variable called `GTK_THEME`. If it's set, please remove it before continuing.
+          required: true
+        - label: Is the dark theme not applied on some apps? Did you try running `gsettings set org.gnome.desktop.interface color-scheme 'prefer-dark'` ?
           required: false
 
   - type: checkboxes