docs: impoving scriptCFM() documentation

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (1037195) 80.06% compared to head (6156c90) 80.06%. Report is 2 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #69 +/- ## ======================================= Coverage 80.06% 80.06% ======================================= Files 20 20 Lines 3697 3697 ======================================= Hits 2960 2960 Misses 737 737 ``` | [Files Changed](https://app.codecov.io/gh/jsakaluk/dySEM/pull/69?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=John+Sakaluk) | Coverage Δ | | |---|---|---| | [R/scriptCFM.R](https://app.codecov.io/gh/jsakaluk/dySEM/pull/69?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=John+Sakaluk#diff-Ui9zY3JpcHRDRk0uUg==) | `96.94% <ø> (ø)` | |

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