chore: bump pgrouting version to 3.8.0

The previously used version was failing to build:

/build/source/src/common/get_check_data.c: In function 'pgr_SPI_getText':
/build/source/src/common/get_check_data.c:307:28: error: passing argument 1 of 'DatumGetCString' makes integer from pointer without a cast [-Wint-conversion]
  307 |     return DatumGetCString(SPI_getvalue(*tuple, *tupdesc, info.colNumber));
      |                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                            |
      |                            char *
In file included from /build/source/include/c_common/postgres_connection.h:29,
                 from /build/source/src/common/get_check_data.c:27:
/nix/store/nn6vpjqlsxxmynwcrsib9agb3hpr5cqj-postgresql-17.4/include/server/postgres.h:335:23: note: expected 'Datum' {aka 'long unsigned int'} but argument is of type 'char *'
  335 | DatumGetCString(Datum X)
      |                 ~~~~~~^
make[2]: *** [src/common/CMakeFiles/common.dir/build.make:149: src/common/CMakeFiles/common.dir/get_check_data.c.o] Error 1

Author: yvan-sraka

nix/ext/pgrouting.nix

@@ -10,7 +10,7 @@
 
 stdenv.mkDerivation rec {
   pname = "pgrouting";
-  version = "3.4.1";
+  version = "3.8.0";
 
   nativeBuildInputs = [
     cmake
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     owner = "pgRouting";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-QC77AnPGpPQGEWi6JtJdiNsB2su5+aV2pKg5ImR2B0k=";
+    hash = "sha256-Lvf7TQ3GywbzZmcd9wi3s8I5sCXIQAPeXNTRk/J46to=";
   };
 
   #disable compile time warnings for incompatible pointer types only on macos and pg16