Apply ruff rule RUF010 to notebooks

RUF010 Use explicit conversion flag

notebooks/dask_copy.ipynb

@@ -204,7 +204,7 @@
     "    r += f'\\n  nbytes: {human_readable_size(nbytes)}'\n",
     "    r += f'; nbytes_stored: {human_readable_size(cbytes)}'\n",
     "    r += f'; ratio: {ratio:.1f}'\n",
-    "    r += f'; chunks: {str(d.chunks)}'\n",
+    "    r += f'; chunks: {d.chunks}'\n",
     "    print(r)\n"
    ]
   },