fix(avatar): avatar comparison - check HEAD requests return status

            )

            return

        # Check whether avatar is up-to-date (if update not forced by user)

        if not self.force_update_avatar:

        # Compare avatar size if destination avatar exist and not forced by user

        if dest_avatar_url is not None and not self.force_update_avatar:

            # fetch avatar size

            try:

                src_avatar_size = requests.head(url=src_avatar_api, headers=src_avatar_api_headers, verify=self.ssl_verify).headers['Content-Length']

                dest_avatar_size = requests.head(url=dest_avatar_api, headers=dest_avatar_api_headers, verify=self.ssl_verify).headers['Content-Length']

                src_avatar_response = requests.head(url=src_avatar_api, headers=src_avatar_api_headers, verify=self.ssl_verify)

                _, src_avatar_size = src_avatar_response.raise_for_status(), src_avatar_response.headers['Content-Length']

                dest_avatar_response = requests.head(url=dest_avatar_api, headers=dest_avatar_api_headers, verify=self.ssl_verify)

                _, dest_avatar_size = dest_avatar_response.raise_for_status(), dest_avatar_response.headers['Content-Length']

                # compare avatar size

                if src_avatar_size == dest_avatar_size:

                    # image up-to-date

                        f"    - avatar image: {AnsiColors.HGRAY}up-to-date{AnsiColors.RESET} ({src_avatar_url} / {dest_avatar_url}) size: {src_avatar_size}"

                    )

                    return

            except GitlabUpdateError as ge:

            except requests.RequestException as ge:

                print(

                    f"    - avatar image: fetch {AnsiColors.HYELLOW}failed{AnsiColors.RESET} ({src_avatar_url}) - assume update needed",

                    f"    - avatar image: compare {AnsiColors.HYELLOW}failed{AnsiColors.RESET} ({src_avatar_url} / {dest_avatar_url}) - assume update needed:",

                    ge,

                )

                # don't rethrow - continue anyway