docs: examples that references code should link to actual files in github

[xrmx]

The rendered docs/examples on read the docs references examples we have in github but some pages do not properly link them and so it's hard for an end user to find the code. For example
https://opentelemetry-python.readthedocs.io/en/stable/examples/metrics/views/README.html lists a bunch of python files but these are not linked to github.

An example with a proper link is https://opentelemetry-python.readthedocs.io/en/stable/examples/django/README.html that is docs/examples/django/README.rst.

So we should review all the content of docs/examples and add proper :scm_web: links.

[saisharan0103]

The repro details point to docs/examples/metrics/views/README.html rendering a list of Python files as plain text, while docs/examples/django/README.rst already links to the corresponding code. docs/examples READMEs are the part I would inspect first, looking for plain filename references that should use :scm_web:. For a PR, I would start by updating those references to target the actual example files in GitHub and keep the rendered docs consistent.