copier update (#182)

Author: jokasimr

.copier-answers.ess.yml

@@ -1,3 +1,3 @@
 # Changes here will be overwritten by Copier; NEVER EDIT MANUALLY
-_commit: d1d5caa
+_commit: 34ca4ba
 _src_path: https://github.com/scipp/ess_template

.github/ISSUE_TEMPLATE/high-level-requirement.yml

@@ -79,6 +79,14 @@ body:
       description: How can we test this requirement? Links to tests data and reference data, or other suggestions.
     validations:
       required: true
+  - type: textarea
+    id: existingimplementations
+    attributes:
+      label: Existing implementations
+      description: Are there any existing implementations or proof-of-concept implementations that we can imitate? This field is specifically for linking to source code.
+      placeholder: "Example: See this repository ... This script implements the procedure: https://file-storage.server.eu/script.code."
+    validations:
+      required: false
   - type: textarea
     id: comments
     attributes: