CI(notebooks): mark lint step continue-on-error until backlog clears

The first run on unslothai/notebooks@main surfaces 27 errors + 6
warnings, all real (peft 0.19+ / torchao floor missing in 6 nb/
notebooks the previous template fixes did not reach, 14 git+ HEAD
installs in hand-tuned exception notebooks, 6 torch/torchcodec ABI
mismatches, 1 transformers/tokenizers --no-deps drift). Mirror the
same continue-on-error pattern PR #5298 used for biome:check on the
frontend so the count surfaces in the PR check UI without forcing
the backlog to be cleaned in the same change. Drop continue-on-error
once the count hits zero.

.github/workflows/notebooks-ci.yml

@@ -114,6 +114,16 @@ jobs:
               --out _converted
 
       - name: Lint (install cells + AST scan, env-scoped)
+        # Reported as non-blocking (continue-on-error: true) until the
+        # backlog of pre-existing findings on unslothai/notebooks@main is
+        # cleared. Same pattern PR #5298 used for biome:check on the
+        # frontend. As of this commit the live tree surfaces 27 errors +
+        # 6 warnings, all real (peft/torchao floor missing in 6 nb/
+        # notebooks, 14 git+ HEAD installs in hand-tuned exception
+        # notebooks, 6 torch/torchcodec ABI mismatches, 1
+        # transformers/tokenizers --no-deps drift). The count surfaces
+        # in the PR check UI. Drop continue-on-error once it hits zero.
+        continue-on-error: true
         run: |
           python unsloth/scripts/notebook_validator.py lint \
               --notebooks-dir notebooks \