Fix TS issues in `writeGitVersion` #964

Job	Run time
Build and Test on Node 20.x	41s
Check package config with are-the-types-wrong (20.x)	11s
Test Types with TypeScript 4.7	39s
Test Published Artifact cra4	1m 25s
Test Types with TypeScript 4.8	36s
Test Types with TypeScript 4.9	41s
Test Published Artifact cra5	1m 20s
Test Types with TypeScript 5.0	33s
Test Published Artifact next	1m 1s
Test Types with TypeScript 5.1	42s
Test Published Artifact vite	54s
Test Types with TypeScript 5.2	41s
Test Published Artifact node-standard	14s
Test Types with TypeScript 5.3	36s
Test Published Artifact node-esm	27s
Test Types with TypeScript 5.4	33s
Test Published Artifact react-native	1m 23s
Test Published Artifact expo	1m 18s
	13m 55s

Provide feedback