chore: fix issue template labels to match label names

- spike.md: question → spike
- task.md: enhancement → task

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: braboj

.github/ISSUE_TEMPLATE/spike.md

@@ -2,7 +2,7 @@
 name: Spike
 about: Research or exploration — output is a decision or ADR
 title: ""
-labels: question
+labels: spike
 assignees: ""
 ---
 

.github/ISSUE_TEMPLATE/task.md

@@ -2,7 +2,7 @@
 name: Task
 about: Atomic implementable unit of work
 title: ""
-labels: enhancement
+labels: task
 assignees: ""
 ---