test: use smaller input file for test-zlib.js

PR-URL: #17988
Fixes: #17986
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

Author: Trott

test/parallel/test-zlib.js

@@ -157,7 +157,7 @@ assert.doesNotThrow(() => {
 }, 'windowsBits set to 8 should follow legacy zlib behavior');
 
 {
-  const node = fs.createReadStream(process.execPath);
+  const node = fs.createReadStream(fixtures.path('person.jpg'));
   const raw = [];
   const reinflated = [];
   node.on('data', (chunk) => raw.push(chunk));