🛂(cli) use github token to avoid rate limiting

Github has an API rate limiting. This rate limiting could
Be increase if we are authenticated. If the environment
variable GITHUB_TOKENiIs defined Arnold will use it to auth.

CHANGELOG.md

@@ -8,7 +8,9 @@ Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## Unreleased
 
-### Changed
+### Added
+
+- Use Gitlab token when call the Github's API
 
 ## [6.19.0] - 2023-09-01
 

bin/arnold

@@ -254,9 +254,14 @@ function _get_log_level_name() {
 
 # Get the latest Arnold release by querying Github's API
 function _get_latest_release() {
+  local auth_header=""
+  if [ -n "$GITHUB_TOKEN" ]; then
+    auth_header="-H 'Authorization: Bearer $GITHUB_TOKEN'"
+  fi
+
   if ! curl \
       -s \
-      -H "Accept: application/vnd.github.v3+json" \
+      -H "Accept: application/vnd.github.v3+json" $auth_header \
       "https://api.github.com/repos/openfun/arnold/releases?per_page=1" ; then
     log debug "Cannot get latest release from GitHub.com"
   fi