CR follow-up: Set Github token as optional input

Signed-off-by: Jerome Prinet <jprinet@gradle.com>

Author: jprinet

.github/actions/gradle/download/action.yml

@@ -4,14 +4,30 @@ description: "Download latest release"
 inputs:
   token:
     description: "Github token"
-    required: true
+    required: false
 
 runs:
   using: "composite"
   steps:
     - name: Get latest release
       run: |
-        downloadUrl=$(curl -S -H 'authorization: Bearer ${{ inputs.token }}' https://api.github.com/repos/gradle/gradle-enterprise-build-validation-scripts/releases/latest | jq -c '.assets[] | select(.content_type == "application/zip")' | jq -r .browser_download_url | grep -v maven)
-        curl -s -L -o gradle-enterprise-gradle-build-validation.zip $downloadUrl
+        authHeader=""
+        if [ ! -z "${{ inputs.token }}" ]; then
+          authHeader="--header 'Authorization: Bearer ${{ inputs.token }}'"
+        fi
+
+        # Build Get Latest release data command
+        cmdGetLatestReleaseData="curl -s $authHeader https://api.github.com/repos/gradle/gradle-enterprise-build-validation-scripts/releases/latest"
+
+        # Get latest release download url
+        downloadUrl=$($cmdGetLatestReleaseData | jq -c '.assets[] | select(.content_type == "application/zip")' | jq -r .browser_download_url | grep -v maven)
+
+        # Build Get Latest release command
+        cmdGetLatestRelease="curl -s -L $authHeader -o gradle-enterprise-gradle-build-validation.zip $downloadUrl"
+
+        # Get latest release
+        eval "$cmdGetLatestRelease"
+
+        # Unzip it
         unzip -q -o gradle-enterprise-gradle-build-validation.zip
       shell: bash