static-build: update libicu version

This patch updates libicu version to 71.1.
See changelog for details (https://icu.unicode.org/download/71).
The main reason to do that is a bug in datetime parsing that was
found using icu-date module (tarantool/icu-date#27)
and was fixed in linicu upstream
(https://unicode-org.atlassian.net/browse/ICU-21802).

NO_DOC=build
NO_TEST=build

changelogs/unreleased/update-libicu-static-build.md

+## feature/build
+
+* Updated libicu version to 71.1 for static build.

static-build/CMakeLists.txt

@@ -8,8 +8,8 @@ cmake_minimum_required(VERSION 2.8)
 project(tarantool-static C CXX)
 
 include(ExternalProject)
-set(LIBICU_VERSION release-62-1/icu4c-62_1)
-set(LIBICU_HASH 490ad9d920158e0314e10ba74ae9a150)
+set(LIBICU_VERSION release-71-1/icu4c-71_1)
+set(LIBICU_HASH e06ffc96f59762bd3c929b217445aaec)
 set(LIBICONV_VERSION 1.16)
 set(LIBICONV_HASH 7d2a800b952942bb2880efb00cfd524c)
 set(OPENSSL_VERSION 1.1.1f)