Update Keyboard Cache Location in MSTG-STORAGE-5

[cpholguera]

Discussed in #2367

^{Originally posted by sohsatoh February 9, 2023}
The "Finding Sensitive Data in the Keyboard Cache" section of MSTG-STORAGE-5 describes the following.

Several options for simplifying keyboard input are available to users. These options include autocorrection and spell checking. cached by default, in /private/var/mobile/Library/Keyboard/dynamic-text.dat.

However, in iOS14 and iOS16, I confirmed that the keyboard cache is stored in /private/var/mobile/Library/Keyboard/<lang>-dynamic.lm/dynamic-lexicon.dat, and the information written in MSTG-STORAGE-5 is already outdated.

Suggestion: let's try to keep it timeless

Several options, such as autocorrect and spell check, are available to users to simplify keyboard input and are cached by default in `.dat' files in /private/var/mobile/Library/Keyboard/ and its subdirectories.

[cpholguera]

Would you mind opening a PR @sohsatoh? Thank you very much.