ak.hist_all docs example produces an error

[ShreyasKhandekar]

Describe the bug
The example for hist_all at https://bears-r-us.github.io/arkouda/autoapi/arkouda/plotting/index.html#arkouda.plotting.hist_all does not work and causes a bug as follows:

To Reproduce

>>> ak_df = ak.DataFrame({"a": ak.array(np.random.randn(100)),
...                           "b": ak.array(np.random.randn(100)),
...                           "c": ak.array(np.random.randn(100)),
...                           "d": ak.array(np.random.randn(100))
...                           })
>>> hist_all(ak_df)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/lus/scratch/khandeka/arkouda/arkouda/plotting.py", line 108, in hist_all
    ax = axes[cols.index(col)]
              ^^^^^^^^^^^^^^^
TypeError: 'list' object is not callable

Expected behavior
To prodouce the histogramming grid plot

Is this a Blocking Issue
Not blocking, but seems quite critical

• Are there any known work-arounds? No

ak.get_config() Output

{'arkoudaVersion': '0+untagged.3981.g9eba2ce.dirty', 'chplVersion': '2.3.0', 'ZMQVersion': '4.3.5', 'HDF5Version': '1.14.3', 'serverHostname': 'x1002c5s3b0n1', 'ServerPort': 5555, 'numLocales': 4, 'numPUs': 128, 'maxTaskPar': 128, 'physicalMemory': 269822640128, 'distributionType': 'BlockDom(1,int(64),one,unmanaged DefaultDist)', 'LocaleConfigs': [{'id': 0, 'name': 'x1002c5s3b0n1', 'numPUs': 128, 'maxTaskPar': 128, 'physicalMemory': 269822640128}, {'id': 1, 'name': 'x1002c5s3b1n0', 'numPUs': 128, 'maxTaskPar': 128, 'physicalMemory': 269822636032}, {'id': 2, 'name': 'x1002c5s3b1n1', 'numPUs': 128, 'maxTaskPar': 128, 'physicalMemory': 269822627840}, {'id': 3, 'name': 'x1002c5s4b0n0', 'numPUs': 128, 'maxTaskPar': 128, 'physicalMemory': 269822644224}], 'authenticate': False, 'logLevel': 'INFO', 'logChannel': 'CONSOLE', 'regexMaxCaptures': 20, 'byteorder': 'little', 'autoShutdown': False, 'serverInfoNoSplash': False, 'maxArrayDims': 3, 'ARROW_VERSION': '18.0.0'}