[typescript] replace headers with same case-insensitive key to match … #122

Job	Run time
Build projects (20.x, samples/client/petstore/typescript-angular-v19-provided-in-root/)	2m 23s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/browser/)	48s
Build projects (20.x, samples/client/petstore/typescript-angular-v16-provided-in-root/)	1m 44s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/default/)	39s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/jquery/)	48s
Build projects (20.x, samples/client/others/typescript-angular/)	59s
Build projects (20.x, samples/client/petstore/typescript-axios/builds/with-npm-version/)	45s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/object_params/)	46s
Build projects (20.x, samples/client/petstore/typescript-angular-v17-provided-in-root/)	1m 43s
Build projects (20.x, samples/client/petstore/typescript-angular-v20-provided-in-root/)	1m 38s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/with-npm-version/)	42s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/default/)	52s
Build projects (20.x, samples/client/petstore/typescript-angular-v18-provided-in-root/)	1m 41s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/es6-target/)	43s
Build projects (20.x, samples/client/petstore/typescript-fetch/tests/default/)	1m 7s
Build projects (20.x, samples/client/petstore/typescript-rxjs/builds/with-npm-version/)	50s
	18m 8s

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