3 spelling errors in the main diagram of the introduction

[sandoba]

As mentioned in https://github.com/TYPO3-Documentation/TYPO3CMS-Reference-CoreApi/pull/4070 there are currently 3 spelling errors in the main diagram of the introduction at https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/Introduction/Index.html.

See: https://github.com/TYPO3-Documentation/TYPO3CMS-Reference-CoreApi/blob/51f04cd439fa3ff6989f2130b0e02c2431d9c467/Documentation/Introduction/Index.rst + https://github.com/TYPO3-Documentation/TYPO3CMS-Reference-CoreApi/blob/main/Documentation/Images/Graphics/Typo3CmsStructure.png

"Costomization" > "Customization" "Ingteraction" > "Interaction" "Database Sever" > "Database Server"

I did not fix those directly as I don't know the specific font used.