ppp: fix PKG_MIRROR_HASH

Current PKG_MIRROR_HASH is wrong, but it went unnoticed, because the
tarball is being fetched from @OPENWRT project mirrors. Can be
reproduced with:

 make package/ppp/{download,check} FIXUP=1 DL_DIR=/tmp PKG_MIRROR_HASH=''

Signed-off-by: Petr Štetiar <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20322
Signed-off-by: Robert Marko <[email protected]>

package/network/services/ppp/Makefile

@@ -14,9 +14,9 @@ PKG_RELEASE:=2
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://github.com/ppp-project/ppp
+PKG_MIRROR_HASH:=381668ce1547afeaf599f08ae37935bfd3d5841747c62bca5a870c11e3e9bedb
 PKG_SOURCE_DATE:=2024-12-31
 PKG_SOURCE_VERSION:=9f612dc02c34509f062ed63b60bcc7e937e25178
-PKG_MIRROR_HASH:=677b71d23b668db986146e13b0c651f2ac506eb4fb244ffba1ff406cbae3511b
 
 PKG_MAINTAINER:=Felix Fietkau <[email protected]>
 PKG_LICENSE:=BSD-4-Clause