deps: update dependency com.google.cloud:google-cloud-monitoring to v2.2.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-monitoring	2.2.0 -> 2.2.1

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Release Notes

googleapis/java-monitoring

v2.2.1

Compare Source

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[codecov]

Codecov Report

Merging #1104 (eec6b2a) into master (b4327c0) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1104   +/-   ##
=========================================
  Coverage     84.99%   84.99%           
- Complexity     2727     2729    +2     
=========================================
  Files           156      156           
  Lines         14410    14410           
  Branches       1379     1379           
=========================================
  Hits          12248    12248           
- Misses         1593     1594    +1     
+ Partials        569      568    -1     

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/com/google/cloud/spanner/SessionPool.java	89.01% <0.00%> (-0.20%)	75.00% <0.00%> (ø%)
...cloud/spanner/connection/ReadWriteTransaction.java	82.09% <0.00%> (+0.27%)	73.00% <0.00%> (+1.00%)
.../google/cloud/spanner/AbstractLazyInitializer.java	100.00% <0.00%> (+7.14%)	5.00% <0.00%> (+1.00%)

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