Add Shorts issue template

.github/ISSUE_TEMPLATE/shorts-not-being-filtered.md

@@ -0,0 +1,26 @@
+---
+name: Shorts not being filtered
+about: Report a Shorts element that's not being filtered.
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Desktop or Mobile:**
+Are you on a desktop device or a mobile device?
+
+**Browser:**
+What browser are you using? (Firefox, Brave, etc.)
+
+**Extension:**
+In what extension are you importing this list? (uBlock, Adblock Plus, etc.)
+
+**URL of the page you saw Shorts:**
+Paste the URL where the Shorts element(s) were not being filtered.
+
+**Screenshots**
+Add a screenshot of the Shorts element.
+
+**Additional context**
+Add any other context about the problem here.