fix: use correct access token for pushing docs content

Author: jelbourn

scripts/release/publish-docs-content.sh

@@ -72,7 +72,7 @@ git config user.name "$commitAuthorName"
 git config user.email "$commitAuthorEmail"
 git config credential.helper "store --file=.git/credentials"
 
-echo "https://${MATERIAL2_BUILDS_TOKEN}:@github.com" > .git/credentials
+echo "https://${MATERIAL2_DOCS_CONTENT_TOKEN}:@github.com" > .git/credentials
 
 git add -A
 git commit -m "$commitMessage"