[elastic] Fix the travis ci configuration typo. (#73)

Author: Henry Wong

.travis.yml

@@ -72,7 +72,7 @@ matrix:
         api_key: $GITHUB_TOKEN
         verbose: true
         file: $GOPATH/src/golang.org/x/tools/build/go-langserver-linux-386.tar.gz
-        name: $MY_TAG
+        name: $TRAVIS_TAG
         draft: false
         prerelease: false
         overwrite: true