Update issue templates (#269)

*Description of changes:* remove blank issue button, update description
of link to discussions


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Author: lostella

Diff for: .github/ISSUE_TEMPLATE/config.yml

@@ -1,12 +1,8 @@
-blank_issues_enabled: true
+blank_issues_enabled: false
 contact_links:
   - name: Frequently asked questions
     url: https://github.com/amazon-science/chronos-forecasting/issues?q=is%3Aissue+label%3AFAQ
     about: Check the frequently asked questions before opening a new one
   - name: Discussions
     url: https://github.com/amazon-science/chronos-forecasting/discussions/new
-    about: Ask questions and discuss with other Chronos users
-  - name: Blank issue
-    url: https://github.com/amazon-science/chronos-forecasting/issues/new
-    about: Open a blank issue if none of the other templates apply
-
+    about: Use this to ask questions and start discussions