updates template to yaml and adds more detail

.github/ISSUE_TEMPLATE/bug-report.yaml

@@ -0,0 +1,47 @@
+name: "Bug report"
+description: "Report a bug in the Elastic Security documentation"
+title: "[BUG] "
+labels: "bug"
+body: 
+  - type: markdown
+    attributes:
+      value: |
+        Hello! Use this form to alert the [@elastic/security-docs](https://github.com/orgs/elastic/teams/security-docs) team to a documentation bug.
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Describe the bug. What needs to be removed, edited, added, or replaced?
+    validations:
+      required: true
+  - type: dropdown
+    id: doc-set
+    attributes:
+      label: Which documentation set(s) include this bug?
+      description: ESS (classic), serverless, or both?
+      options:
+        - ESS and serverless
+        - ESS only
+        - Serverless only
+        - Unknown
+      default: 0
+    validations:
+      required: true
+  - type: textarea
+    id: doc-links
+    attributes:
+      label: Documentation links
+      description: Which docs are affected?
+      placeholder: |
+        E.g. https://www.elastic.co/guide/en/security/current/es-overview.html
+    validations:
+      required: true
+  - type: textarea
+    id: how-to-reproduce
+    attributes:
+      label: Bug reproduction instructions
+      description: If this bug is related to part of Elastic Security, such as a screenshot that is no longer accurate, please tell us how to reproduce the relevant software state. If applicable, provide testing environment information, or steps to generate necessary data.
+      placeholder: |
+        E.g. Go to the Alerts page. Make sure there are at least 10 alerts. Open the Fields menu and you'll see... 
+    validations:
+      required: true