Update Travis references in scripts

scripts/build.sh

@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 
-# This script is executed by Travis CI for every successful push (on any branch, PR or not).
+# This script is executed by GitHub Actions for every successful push (on any branch, PR or not).
 set -ex
 
 function initialize {
   if [ -z "$TLDRHOME" ]; then
-    export TLDRHOME=${TRAVIS_BUILD_DIR:-$(pwd)}
+    export TLDRHOME=${GITHUB_WORKSPACE:-$(pwd)}
   fi
 
   export TLDR_ARCHIVE="tldr.zip"