unmute ESVectorUtilTests#testSoarDistance on 9.1 (#135680)

Unmute `ESVectorUtilTests#testSoarDistance` as the
[fix](https://github.com/elastic/elasticsearch/pull/131700) has been
merged.

muted-tests.yml

@@ -449,9 +449,6 @@ tests:
 - class: org.elasticsearch.aggregations.bucket.AggregationReductionCircuitBreakingIT
   method: testCBTrippingOnReduction
   issue: https://github.com/elastic/elasticsearch/issues/134902
-- class: org.elasticsearch.simdvec.ESVectorUtilTests
-  method: testSoarDistance
-  issue: https://github.com/elastic/elasticsearch/issues/135139
 
 # Examples:
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