deps: bump Spring Boot to 3.1.3 for Cloud Run sample

[olavloite]

Update the Cloud Run sample to use the latest version of Spring Boot. This also requires Java 17 or higher.

[codecov]

Codecov Report

Merging #1023 (0e6a615) into postgresql-dialect (0215ea3) will decrease coverage by 1.78%.
The diff coverage is n/a.

❗ Current head 0e6a615 differs from pull request most recent head 26e8c98. Consider uploading reports for the commit 26e8c98 to get more accurate results

@@                   Coverage Diff                    @@
##             postgresql-dialect    #1023      +/-   ##
========================================================
- Coverage                 90.31%   88.54%   -1.78%     
+ Complexity                 2556     2505      -51     
========================================================
  Files                       141      141              
  Lines                      8508     8508              
  Branches                   1264     1264              
========================================================
- Hits                       7684     7533     -151     
- Misses                      560      675     +115     
- Partials                    264      300      +36     

Flag	Coverage Δ
all_tests	88.54% <ø> (-1.78%)	⬇️

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