docs: correct Float type size in Preferences API and Tutorial documentation

[Xylopyrographer]

Description of Change

Correct the size of the Preferences Float type in the API and Tutorial documentation

Tests scenarios

Verified by running a sketch that returns the sizeof() a float_t and a float variable.

Related links

None

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "Correct Float type size": summary looks empty type/action looks empty the commit message "Correct Float type size": body's lines must not be longer than 100 characters summary looks empty type/action looks empty the commit message "Correct doc build error": summary looks empty type/action looks empty the commit message "Update Float call prototype": summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

	Messages
📖	You might consider squashing your 4 commits (simplifying branch history).

👋 Hello Xylopyrographer, we appreciate your contribution to this project!

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[P-R-O-C-H-Y]

@Xylopyrographer Can you please fix the docs build issue? Thanks
https://github.com/espressif/arduino-esp32/actions/runs/10243239705/job/28334187030?pr=10113#step:4:477