github:

Add tags based on this tutorial:
https://cwiki.apache.org/confluence/display/INFRA/git+-+.asf.yaml+features#git.asf.yamlfeatures-Repositorymetadata
and this JIRA:
https://issues.apache.org/jira/browse/INFRA-20886

.asf.yaml

+github:
+  homepage: https://echarts.apache.org/
+  labels:
+    - echarts
+    - data-visualization
+    - charts
+    - charting-library
+    - visualization
+    - apache
+    - data-viz
+    - canvas
+    - svg