Fix GCS migration page image #1238

Job	Run time
get_available_profiles	4s
merge_client_pr	0s
close_client_pr	0s
update_client_pr (android-uploader, api.video-android-uploader)	58s
update_client_pr (android, api.video-android-client)	49s
update_client_pr (csharp, api.video-csharp-client)	36s
update_client_pr (go, api.video-go-client)	34s
update_client_pr (java, api.video-java-client)	1m 4s
update_client_pr (nodejs, api.video-nodejs-client)	2m 38s
update_client_pr (php, api.video-php-client)	33s
update_client_pr (python, api.video-python-client)	24s
update_client_pr (swift5-uploader, api.video-swift-uploader)	21s
update_client_pr (swift5, api.video-swift-client)	26s
generate_documentation	19s
	8m 46s

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