php8: update to 8.1.3

This fixes:
    - CVE-2021-21708

Signed-off-by: Michael Heimpold <mhei@heimpold.de>

lang/php8/Makefile

@@ -6,7 +6,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=php
-PKG_VERSION:=8.1.2
+PKG_VERSION:=8.1.3
 PKG_RELEASE:=1
 
 PKG_MAINTAINER:=Michael Heimpold <mhei@heimpold.de>
@@ -16,7 +16,7 @@ PKG_CPE_ID:=cpe:/a:php:php
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=http://www.php.net/distributions/
-PKG_HASH:=6b448242fd360c1a9f265b7263abf3da25d28f2b2b0f5465533b69be51a391dd
+PKG_HASH:=5d65a11071b47669c17452fb336c290b67c101efb745c1dbe7525b5caf546ec6
 
 PKG_BUILD_PARALLEL:=1
 PKG_USE_MIPS16:=0