Fix mongo3.6 installation

Author: bagerard

.github/workflows/install_mongo.sh

@@ -16,7 +16,7 @@ if [[ "${MONGODB}" =~ ^(7.0|8.0) ]]; then
   mongo_build="mongodb-linux-x86_64-ubuntu2004-${MONGODB}"
 elif [[ "${MONGODB}" =~ ^(4.0|4.2|4.4|5.0|6.0) ]]; then
   mongo_build="mongodb-linux-x86_64-ubuntu1804-${MONGODB}"
-elif [[ "${MONGODB}" =~ ^3.6$ ]]; then
+elif [[ "${MONGODB}" =~ ^3.6 ]]; then
   mongo_build="mongodb-linux-x86_64-${MONGODB}"
 else
   echo "Error: Unsupported MongoDB version: ${MONGODB}"