CI: Modify silence.txt add ub fp

[xsscx]

Maintainer Summary

2026-08-19 13:54:31 UTC

Add to UB silence.txt

iccProfilePlot sRGB_v4_ICC_preference.icc list
/usr/lib/gcc/x86_64-linux-gnu/15/../../../../include/c++/15/bits/basic_string.tcc:786:17: runtime error: unsigned integer overflow: 0 - 1 cannot be represented in type 'size_type' (aka 'unsigned long')
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior /usr/lib/gcc/x86_64-linux-gnu/15/../../../../include/c++/15/bits/basic_string.tcc:786:17

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