build: fix version tags to use correct values

[BenWhitehead]

Fixes broken builds from #369 visible in https://github.com/googleapis/java-firestore/pull/369/checks?check_run_id=1710823233

[codecov]

Codecov Report

Merging #501 (9356326) into master (23d5415) will decrease coverage by 0.33%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #501 +/- ##
============================================
- Coverage 74.43% 74.09% -0.34% - Complexity 1108 1117 +9 
============================================
Files 66 66 Lines 5855 5883 +28 Branches 726 723 -3 ============================================
+ Hits 4358 4359 +1 - Misses 1269 1296 +27 
Partials 228 228 

Impacted Files	Coverage Δ	Complexity Δ
...va/com/google/cloud/firestore/CollectionGroup.java	12.30% <0.00%> (-6.62%)	1.00% <0.00%> (ø%)

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