chore: Allow to create issues without a template

Let's see if this works (seems to work in most apps),
we can still revert this when it does turn out that
too many unexperienced reports come in.

Signed-off-by: Joas Schilling <coding@schilljs.com>

.github/ISSUE_TEMPLATE/BUG_REPORT.yml

@@ -1,4 +1,4 @@
-name: "Bug report: Nextcloud Server"
+name: "🐛 Bug report: Nextcloud Server"
 description: "Submit a report and help us improve Nextcloud Server"
 title: "[Bug]: "
 labels: ["bug", "0. Needs triage"]

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,3 @@
-blank_issues_enabled: false
 contact_links:
     - name: 🚨 Report a security or privacy issue
       url: https://hackerone.com/nextcloud