docs(github): Add icons to the issue workflow

Introduce a bit of color.

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

.github/ISSUE_TEMPLATE/bug.md

@@ -1,5 +1,5 @@
 ---
-name: Bug Report
+name: Bug Report 🐞
 about: I want to report a bug that I am facing.
 title: ''
 labels: ['bug', 'to triage']

.github/ISSUE_TEMPLATE/config.yml

@@ -1,7 +1,7 @@
 contact_links:
-- name: Discuss an Idea
+- name: Discuss an Idea 💡
   about: Start a discussion or ask a longer question.
   url: https://github.com/oss-review-toolkit/ort/discussions
-- name: Ask a Question
+- name: Ask a Question 🤔
   about: Ask a quick question or just chat with the ORT community.
   url: http://slack.oss-review-toolkit.org/

.github/ISSUE_TEMPLATE/enhancement.md

@@ -1,5 +1,5 @@
 ---
-name: Enhancement Proposal
+name: Enhancement Proposal ⚡
 about: I want to propose to enhance existing functionality.
 title: ''
 labels: ['enhancement', 'to triage']

.github/ISSUE_TEMPLATE/feature.md

@@ -1,5 +1,5 @@
 ---
-name: Feature Request
+name: Feature Request 🎉
 about: I want to request a new feature that I find useful.
 title: ''
 labels: ['new feature', 'to triage']