docs: update issue templates

Author: dileepadev

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,9 +1,9 @@
 ---
 name: Bug report
 about: Create a report to help us improve
-title: "[Bug]: Short description of the issue"
+title: "🐞 Bug: Short description of the issue"
 labels: "bug, needs triage"
-assignees: "@dileepabandara"
+assignees: "dileepabandara"
 ---
 
 ## Bug Report

.github/ISSUE_TEMPLATE/documentation_update.md

@@ -1,9 +1,9 @@
 ---
 name: Documentation update
 about: Propose a change to the project documentation
-title: "[Docs]: Short description of the change"
+title: "📝 Docs: Short description of the change"
 labels: "documentation, needs review"
-assignees: "@dileepabandara"
+assignees: "dileepabandara"
 ---
 
 ## Documentation Update

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,9 +1,9 @@
 ---
 name: Feature request
 about: Suggest a feature for this project
-title: "[Feature Request]: Short description of the feature"
+title: "🚀 Feature: Short description of the feature"
 labels: "enhancement, needs triage, feature request"
-assignees: "@dileepabandara"
+assignees: "dileepabandara"
 ---
 
 ## Feature Request