Fix typo in FID description: Replace "access" with "assess"

[isztldav]

The previous description incorrectly used the word "access" instead of "assess" when describing the purpose of Fréchet Inception Distance (FID). This change corrects the typo to ensure clarity and accuracy.

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📚 Documentation preview 📚: https://torchmetrics--2919.org.readthedocs.build/en/2919/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37%. Comparing base (5fc2e0b) to head (c4ec2d3).
Report is 3 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (5fc2e0b) and HEAD (c4ec2d3). Click for more details.

HEAD has 410 uploads less than BASE

Flag	BASE (5fc2e0b)	HEAD (c4ec2d3)
macOS	28	4
python3.10	63	9
cpu	118	17
torch2.0.1	14	2
python3.11	28	4
torch2.6.0	7	1
torch2.6.0+cpu	14	2
Windows	21	3
torch2.0.1+cpu	20	3
python3.12	21	3
torch2.5.0	7	1
torch2.5.0+cpu	21	3
Linux	69	10
torch2.4.1+cpu	14	2
python3.9	6	1
torch2.2.2+cpu	7	1
torch2.3.1+cpu	7	1
torch2.1.2+cpu	7	1
gpu	3	0
unittest	3	0

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #2919     +/-   ##
========================================
- Coverage      69%     37%    -32%     
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  Files         346     332     -14     
  Lines       19172   18996    -176     
========================================
- Hits        13236    7110   -6126     
- Misses       5936   11886   +5950