Bump lightly from 1.5.17 to 1.5.18 in /requirements (#2544)

Author: dependabot[bot]

requirements/required.txt

@@ -5,7 +5,7 @@ setuptools==75.8.0
 einops==0.8.0
 fiona==1.10.1
 kornia==0.8.0
-lightly==1.5.17
+lightly==1.5.18
 lightning[pytorch-extra]==2.5.0.post0
 matplotlib==3.10.0
 numpy==2.2.2