protobuf_25: 25.6 -> 25.7

Diff: https://github.com/protocolbuffers/protobuf/compare/v25.6...v25.7

Changelog:
https://github.com/protocolbuffers/protobuf/releases/tag/v25.7

pkgs/development/libraries/protobuf/25.nix

···
 
 callPackage ./generic.nix (
   {
-    version = "25.6";
-    hash = "sha256-pXZGffQXjAUXworfcr75BrkADamC9pKZXNK0l/Bvk9g=";
+    version = "25.7";
+    hash = "sha256-tCl37I/6iXtfGPw/HVZYdudJWYdzPfnN7piLDpR/bgk=";
   }
   // args
 )