Update default address from 0.0.0.0 to 127.0.0.1 in documentation and examples

[namannandan]

Fixes #2610

[codecov]

Codecov Report

Merging #2624 (5e3c1b9) into master (8bd76ee) will increase coverage by 1.89%.
Report is 118 commits behind head on master.
The diff coverage is 73.47%.

❗ Current head 5e3c1b9 differs from pull request most recent head c5d0cef. Consider uploading reports for the commit c5d0cef to get more accurate results

@@            Coverage Diff             @@
##           master    #2624      +/-   ##
==========================================
+ Coverage   69.44%   71.34%   +1.89%     
==========================================
  Files          77       85       +8     
  Lines        3450     3905     +455     
  Branches       57       58       +1     
==========================================
+ Hits         2396     2786     +390     
- Misses       1051     1115      +64     
- Partials        3        4       +1     

Files	Coverage Δ
...l-archiver/model_archiver/model_packaging_utils.py	92.30% <100.00%> (+32.17%)	⬆️
setup.py	0.00% <ø> (ø)
ts/arg_parser.py	25.80% <ø> (ø)
ts/context.py	67.53% <ø> (ø)
ts/metrics/caching_metric.py	89.47% <100.00%> (ø)
ts/metrics/metric_abstract.py	92.85% <100.00%> (ø)
ts/metrics/metric_cache_abstract.py	93.18% <100.00%> (+0.41%)	⬆️
ts/metrics/metric_cache_yaml_impl.py	93.24% <100.00%> (ø)
ts/model_loader.py	88.31% <ø> (ø)
...sts/metrics_yaml_testing/metric_cache_unit_test.py	99.68% <100.00%> (+0.02%)	⬆️
... and 20 more

... and 3 files with indirect coverage changes

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