Update "Visualize Results" Guide Plot Histogram Section for SamplerV2

[haileed04]

URL to the relevant documentation

The current example in the guide for using plot_histogram to visualise results from Sampler are outdated. SamplerV2 returns a PrimitiveResult which doesn't have quasi_dist attribute, the migration guide docs explain how a somewhat equivalent solution can be implemented here: https://docs.quantum.ibm.com/api/qiskit/primitives#migration-from-primitives-v1-to-v2 but it's not the clearest because it only shows how to get the equivalent of what quasi_dist would have returned, not how to plot it! Thanks :)

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• typo
• code bug
• out-of-date content
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Describe the fix.

Update the content! Here's the link to the example: https://docs.quantum.ibm.com/guides/visualize-results

[javabster]

thanks for this catch! We'll update as soon as we can, or if you would like to open a PR for it you are very welcome to!