icu76: 76.1rc -> 76.1 (#351275)

pkgs/development/libraries/icu/default.nix

···
 in
 {
   icu76 = make-icu {
-    version = "76.1rc";
-    hash = "sha256-HMY4hRYbF4Dsf1EGx+m0NRsCUA+Q/JGRpdGIgym/A5I=";
+    version = "76.1";
+    hash = "sha256-36y0a/5HR0EEcs4+EUS/KKEC/uqk44dbrJtMbPMPTz4=";
   };
   icu75 = make-icu {
     version = "75.1";

pkgs/development/libraries/icu/make-icu.nix

···
 
   pname = "icu4c";
 
-  #release = lib.replaceStrings [ "." ] [ "-" ] version;
+  release = lib.replaceStrings [ "." ] [ "-" ] version;
   # To test rc versions of ICU replace the line above with the line below.
-  release = lib.replaceStrings [ "." ] [ "-" ] (if lib.hasSuffix "rc" version then lib.replaceStrings [ "1" ] [ "" ] version else version);
+  #release = lib.replaceStrings [ "." ] [ "-" ] (if lib.hasSuffix "rc" version then lib.replaceStrings [ "1" ] [ "" ] version else version);
 
   baseAttrs = {
     src = fetchurl {