gnu: node-lts: Fix build.

* gnu/packages/node.scm (node-lts)[inputs]: Replace icu4c with icu4c-76.
[native-inputs]: Replace icu4c with icu4c-76.

Change-Id: Iea508b914b3c576900ae3cdcc85ae98a4550142b
Signed-off-by: Andreas Enge <andreas@enge.fr>

gnu/packages/node.scm

@@ -963,7 +963,7 @@ fi"
      (list ;; Runtime dependencies for binaries used as a bootstrap.
            c-ares-for-node-lts
            brotli
-           icu4c
+           icu4c-76
            libuv-for-node-lts
            `(,nghttp2 "lib")
            openssl
@@ -979,7 +979,7 @@ fi"
      (list bash-minimal
            coreutils
            c-ares-for-node-lts
-           icu4c
+           icu4c-76
            libuv-for-node-lts
            llhttp-bootstrap
            brotli