Updated templates

.github/ISSUE_TEMPLATE/3-accessibility.md

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+---
+name: Accessibility problem or improvement request
+about: Help make Grafana be better at keyboard navigation, screen-readable and accessible to all.
+labels: 'type: accessibility'
+---
+
+<!--
+Please only use this template for submitting accessibility issues.
+
+This is a new feature area for Grafana that we want to improve. We have long way to go
+to really improve accessibility and would like your help to know where to start.
+-->
+
+**Steps to reproduce**:
+
+**Actual Result**:
+
+**Expected Result**
+
+**Relevant WCAG Criteria:** [#.#.# WCAG Criterion](link to https://www.w3.org/WAI/WCAG21/quickref/?versions=2.0)
+
+**Environment**:
+- Grafana version:
+- Data source type & version:
+- User OS & Browser:
+- Others: