[Backport] [1.x] add rc1 release notes to GA release

[ylwu-amzn]

Signed-off-by: Yaliang Wu [email protected]

Description

Backport #116 to 1.x branch.

Check List

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[codecov-commenter]

Codecov Report

Merging #118 (510dee9) into 1.x (1896ce1) will decrease coverage by 0.18%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                1.x     #118      +/-   ##
============================================
- Coverage     79.50%   79.32%   -0.19%     
+ Complexity     2699     2691       -8     
============================================
  Files           243      243              
  Lines         11132    11132              
  Branches       1014     1014              
============================================
- Hits           8851     8830      -21     
- Misses         1869     1887      +18     
- Partials        412      415       +3     

Flag	Coverage Δ
plugin	79.32% <ø> (-0.19%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../main/java/org/opensearch/ad/cluster/HashRing.java	78.94% <0.00%> (-5.27%)	⬇️
...port/SearchAnomalyDetectorInfoTransportAction.java	63.63% <0.00%> (-4.55%)	⬇️
src/main/java/org/opensearch/ad/model/ADTask.java	95.31% <0.00%> (-2.82%)	⬇️
...ain/java/org/opensearch/ad/task/ADTaskManager.java	72.99% <0.00%> (-0.90%)	⬇️
...opensearch/ad/indices/AnomalyDetectionIndices.java	51.09% <0.00%> (-0.63%)	⬇️
...java/org/opensearch/ad/task/ADBatchTaskRunner.java	87.82% <0.00%> (-0.58%)	⬇️