Fix TS issues in `writeGitVersion` #941

Job	Run time
Build and Test on Node 20.x	42s
Check package config with are-the-types-wrong (20.x)	11s
Test Published Artifact cra4	1m 23s
Test Types with TypeScript 4.7	38s
Test Published Artifact cra5	1m 19s
Test Published Artifact next	1m 3s
Test Types with TypeScript 4.8	40s
Test Published Artifact vite	1m 1s
Test Types with TypeScript 4.9	40s
Test Types with TypeScript 5.0	34s
Test Published Artifact node-standard	14s
Test Published Artifact node-esm	21s
Test Types with TypeScript 5.1	39s
Test Published Artifact react-native	1m 12s
Test Types with TypeScript 5.2	35s
Test Published Artifact expo	1m 9s
Test Types with TypeScript 5.3	31s
Test Types with TypeScript 5.4	37s
	13m 29s

Provide feedback