Fix detection of pdflatex following the deprecation of “which” in Debian Bookworm

src/@report/compile.m

@@ -79,7 +79,9 @@ if isempty(opts.compiler)
         middle = ' ';
         opts.compiler = ['"' strtrim(opts.compiler) '"'];
     elseif isunix
-        [status, opts.compiler] = system('which pdflatex');
+        % “which” has been deprecated in Debian Bookworm; rather use “command -v”
+        % which should work with any reasonably recent GNU/Linux shell
+        [status, opts.compiler] = system('command -v pdflatex');
     end
     assert(status == 0, ...
            '@report.compile: Could not find a tex compiler on your system');
@@ -131,4 +133,4 @@ if status ~= 0
     error(['@report.compile: There was an error in compiling ' rfn '.pdf.' ...
         '  ' opts.compiler ' returned the error code: ' num2str(status)]);
 end
-end
\ No newline at end of file
+end