Revise issue templates

.github/ISSUE_TEMPLATE/0-docs.yml

@@ -0,0 +1,26 @@
+name: '📃 Documentation Issue'
+description: Report an issue with Mithril.js's documentation
+assignees: dead-claudia
+labels:
+- 'Area: Documentation'
+body:
+- type: checkboxes
+  attributes:
+    label: Is there an existing issue for this?
+    description: Please search to see if an issue already exists for the bug you encountered.
+    options:
+    - label: I have searched the existing issues
+      required: true
+- type: input
+  attributes:
+    label: Offending URL
+    description: Provide a link to the page with the issue
+    placeholder: https://mithril.js.org/
+  validations:
+    required: true
+- type: textarea
+  attributes:
+    label: Issue description
+    description: What is the precise issue with it. Please be specific.
+  validations:
+    required: true