Recommend OTel in README

[srprash]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[NathanielRN]

Thank you for this quick follow up! 🙂

[codecov-commenter]

Codecov Report

Merging #340 (1a2c227) into master (a9ec225) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #340      +/-   ##
============================================
- Coverage     59.02%   58.96%   -0.06%     
  Complexity     1207     1207              
============================================
  Files           131      131              
  Lines          5064     5064              
  Branches        592      592              
============================================
- Hits           2989     2986       -3     
- Misses         1802     1805       +3     
  Partials        273      273              

Impacted Files	Coverage Δ
...va/com/amazonaws/xray/entities/SubsegmentImpl.java	71.83% <0.00%> (-4.23%)	⬇️

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