rule.json file does not always get updated correctly

[WilcoFiers]

I spotted that after an update to the letter spacing rules recently two of the three were switched to deprecated for no apparent reason, and their rule name wasn't changed correctly. I switched it back manually, which works for now, but I'd like to know why this happened so we can prevent it in the future.

d2b0901

[WilcoFiers]

Turns out there is also a problem with testcases.json. Several test cases are now missing from the word spacing rule. This probably happened because this PR duplicated two of the spacing rules, deprecating the older version of it. That doesn't work because the IDs were kept the same: https://github.com/act-rules/act-rules.github.io/pull/1923/files

I'm discussing with @Jym77 and @carlosapaduarte whether we need to change the rule IDs or if we need to delete the deprecated rule files.

[Jym77]

Should be fixed by act-rules/act-rules.github.io#2134