Update ElasticSearch article Link

[timyip3]

Which problem is this PR solving?

• This PR is to update the link about ElasticSearch shards optimization as the existing link cannot be accessed.

Description of the changes

• update the link about ElasticSearch shards optimization.

How was this change tested?

• confirm the updated link can be accessed.

Checklist

• [x ] I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• [x ] I have signed all commits
  - [ ] I have added unit tests for the new functionality
  - [ ] I have run lint and test steps successfully
  ~~ - for jaeger: make lint test~~
  ~~ - for jaeger-ui: npm run lint and npm run test~~

[yurishkuro]

Thanks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.96%. Comparing base (0934a42) to head (5bdde87).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6662      +/-   ##
==========================================
- Coverage   95.99%   95.96%   -0.03%     
==========================================
  Files         363      363              
  Lines       20603    20603              
==========================================
- Hits        19777    19772       -5     
- Misses        630      634       +4     
- Partials      196      197       +1     

Flag	Coverage Δ
badger_v1	9.82% <ø> (ø)
badger_v2	1.82% <ø> (ø)
cassandra-4.x-v1-manual	14.79% <ø> (ø)
cassandra-4.x-v2-auto	1.81% <ø> (ø)
cassandra-4.x-v2-manual	1.81% <ø> (ø)
cassandra-5.x-v1-manual	14.79% <ø> (ø)
cassandra-5.x-v2-auto	1.81% <ø> (ø)
cassandra-5.x-v2-manual	1.81% <ø> (ø)
elasticsearch-6.x-v1	19.12% <ø> (ø)
elasticsearch-7.x-v1	19.20% <ø> (ø)
elasticsearch-8.x-v1	19.37% <ø> (ø)
elasticsearch-8.x-v2	1.93% <ø> (+0.11%)	⬆️
grpc_v1	10.80% <ø> (ø)
grpc_v2	7.81% <ø> (ø)
kafka-3.x-v1	10.12% <ø> (ø)
kafka-3.x-v2	1.82% <ø> (ø)
memory_v2	1.82% <ø> (ø)
opensearch-1.x-v1	19.25% <ø> (ø)
opensearch-2.x-v1	19.25% <ø> (ø)
opensearch-2.x-v2	1.82% <ø> (ø)
tailsampling-processor	0.48% <ø> (ø)
unittests	94.85% <ø> (-0.03%)	⬇️

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