chore: update python version

Author: tdnghia98

Makefile

@@ -1,6 +1,6 @@
 # Makefile variables set automatically
-plugin_id=`cat plugin.json | python -c "import sys, json; print(str(json.load(sys.stdin)['id']).replace('/',''))"`
-plugin_version=`cat plugin.json | python -c "import sys, json; print(str(json.load(sys.stdin)['version']).replace('/',''))"`
+plugin_id=`cat plugin.json | python3 -c "import sys, json; print(str(json.load(sys.stdin)['id']).replace('/',''))"`
+plugin_version=`cat plugin.json | python3 -c "import sys, json; print(str(json.load(sys.stdin)['version']).replace('/',''))"`
 archive_file_name="dss-plugin-${plugin_id}-${plugin_version}.zip"
 remote_url=`git config --get remote.origin.url`
 last_commit_id=`git rev-parse HEAD`