docs: compress search_content.json for release

Signed-off-by: Cristian Staretu <cristian.staretu@gmail.com>

Docker-DCO-1.1-Signed-off-by: unclejack <unclejacksons@gmail.com> (github: SvenDowideit)

docs/release.sh

@@ -72,6 +72,8 @@ setup_s3() {
 
 build_current_documentation() {
 	mkdocs build
+	cd site/
+	gzip -9k search_content.json
 }
 
 upload_current_documentation() {