Fix CLIPMergeSimple ratio documentation (fixes #918)

[lin-bot23]

Fixes #918

Problem

The CLIPMergeSimple documentation described the ratio parameter backwards:

• It claimed ratio = 0.0 = 100% clip1 and ratio = 1.0 = 100% clip2
• The actual code does m.add_patches({k: kp[k]}, 1.0 - ratio, ratio), which means:
  • ratio = 1.0 → patch strength = 0, model strength = 1.0 → 100% clip1
  • ratio = 0.0 → patch strength = 1.0, model strength = 0 → 100% clip2

This matches ModelMergeSimple behavior exactly (which already had correct docs).

Changes

• English: Corrected the ratio input description and the "Ratio Parameter Explained" section
• 简体中文: Same corrections in Chinese
• 日本語: Same corrections in Japanese

Verification

# Both CLIPMergeSimple and ModelMergeSimple use the same merge pattern:
m = model1.clone()
kp = model2.get_key_patches()
for k in kp:
    m.add_patches({k: kp[k]}, 1.0 - ratio, ratio)
# ratio = 1.0 → 100% model1, ratio = 0.0 → 100% model2