Add a single value to the dictionary directly rather than using update()

[ThibFrgsGmz]

Originating Project/Creator	@ThibFrgsGmz
Affected Component	fbuild
Affected Architectures(s)	none
Related Issue(s)	(void)
Has Unit Tests (y/n)	n
Builds Without Errors (y/n)	y
Unit Tests Pass (y/n)	n
Documentation Included (y/n)	n

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Change Description

This PR aims to change the way to add a single value to the dictionary by doing it directly rather than using update() when possible.

Rationale

It is easier to add an entry to a dictionary directly rather than using the update() method. It also removes the overhead of creating another dictionary and calling a method, which should improve performance slightly.

Testing/Review Recommendations

(void)

Future Work

(void)