README: bump required minimum version of musl to 1.2.6

musl v1.2.6 has been released on 2026-03-20:
https://git.musl-libc.org/cgit/musl/commit/?id=9fa28ece75d8a2191de7c5bb53bed224c5947417

alpine/postmarketos already have musl v1.2.6 in the edge repository:
https://pkgs.alpinelinux.org/package/edge/main/x86_64/musl

Also, Yocto Project 6.0 (wrynose) already has v1.2.6.

Let's bump the requirement now.

diff --git a/README b/README
index 1cae26ba3a5f6aaebc4503e5b5d279bee7383684..a198637d133ecba93f32d8a8c8cfcfcafb4c2506 100644 (file)
--- a/README
+++ b/README
@@ -205,8 +205,7 @@ REQUIREMENTS:
           CONFIG_MEMCG
 
         glibc >= 2.34
-        musl >= 1.2.5 with fde29c04adbab9d5b081bf6717b5458188647f1c
-                (required when building systemd with -Dlibc=musl)
+        musl >= 1.2.6 (required when building systemd with -Dlibc=musl)
         libxcrypt >= 4.4.0 (optional)
         libmount >= 2.30 (from util-linux)
                 (util-linux *must* be built without --enable-libmount-support-mtab)