Update step-10-descriptor-for-applications-8f93bf2.md

[DNA5769]

Removed duplicate sentence which is also present in
https://github.com/DNA5769/sapui5/blob/f45f2b9534560f98bddfebe492b1946c0f32f461/docs/03_Get-Started/step-10-descriptor-for-applications-8f93bf2.md?plain=1#L114

The sentence is more relevant in its second occurrence, so I removed the first occurrence.

[cla-assistant]

All committers have signed the CLA.

[OlMue]

Hi @DNA5769, thanks for pointing this out. We'll take a look.

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[KlattG]

Fixed as of the next UI5 release.

[DNA5769]

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