Create documentation_issue.yml as Github Issue Template for documentation (#460)

.github/ISSUE_TEMPLATE/documentation_issue.yml

@@ -0,0 +1,11 @@
+name: Documentation
+description: Report an issue related to the Embedchain docs.
+title: "DOC: <Please write a comprehensive title after the 'DOC: ' prefix>"
+
+body:
+- type: textarea
+  attributes:
+    label: "Issue with current documentation:"
+    description: >
+      Please make sure to leave a reference to the document/code you're
+      referring to.