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

@@ -10,6 +10,10 @@
 }:
 let
   pname = "pgrouting";
+<<<<<<< HEAD
+=======
+  version = "3.8.0";
+>>>>>>> 054e04ac (chore: bump `pgrouting` version to 3.8.0)
 
   # Load version configuration from external file
   allVersions = (builtins.fromJSON (builtins.readFile ./versions.json)).${pname};
@@ -122,10 +126,19 @@ buildEnv {
     "/share/postgresql/extension"
   ];
 
+<<<<<<< HEAD
   postBuild = ''
     #Verify all expected library files are present
     expectedFiles=${toString (numberOfVersions + 1)}
     actualFiles=$(ls -l $out/lib/lib${pname}*${postgresql.dlSuffix} | wc -l)
+=======
+  src = fetchFromGitHub {
+    owner = "pgRouting";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-Lvf7TQ3GywbzZmcd9wi3s8I5sCXIQAPeXNTRk/J46to=";
+  };
+>>>>>>> 054e04ac (chore: bump `pgrouting` version to 3.8.0)
 
     if [[ "$actualFiles" != "$expectedFiles" ]]; then
       echo "Error: Expected $expectedFiles library files, found $actualFiles"