Fix release name in Preview-Feedback issue template (#980)

Author: eemeli

.github/ISSUE_TEMPLATE/tech-preview-feedback.md

@@ -1,11 +1,6 @@
 ---
 name: Tech Preview Feedback
-about: Use this template to enter feedback on the Tech Preview (LDML45) release of
-  MF2
+about: Use this template to enter feedback on the Final Candidate release of MF2
 title: "[FEEDBACK] "
 labels: Preview-Feedback
-assignees: ''
-
 ---
-
-