fix(deps): update module cloud.google.com/go/spanner to v1.45.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cloud.google.com/go/spanner	require	minor	v1.44.0 -> v1.45.0

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[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (8b7ad8e) 75.80% compared to head (9d33c72) 75.80%.

❗ Current head 9d33c72 differs from pull request most recent head 4f121f2. Consider uploading reports for the commit 4f121f2 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #283   +/-   ##
=======================================
  Coverage   75.80%   75.80%           
=======================================
  Files          28       28           
  Lines         926      926           
=======================================
  Hits          702      702           
  Misses        178      178           
  Partials       46       46           

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