ci: bump claude max-turns from 30 to 50

Last run hit "Reached max turns (30)" after ~10 min, suggesting the
search + dual-file edit task consistently saturates 30 turns. 50 leaves
headroom for the final date-bump / trend-update steps that were at risk
of being truncated.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: BinHPdev

.github/workflows/weekly-update.yml

@@ -43,7 +43,7 @@ jobs:
           echo "🔍 开始搜索最新算法自动化工具..."
 
           claude -p "$PROMPT" \
-            --max-turns 30 \
+            --max-turns 50 \
             --allowedTools "WebSearch,Read,Edit,Write,Glob,Grep,Bash(git diff*),Bash(git status*),Bash(wc *),Bash(date*)" \
             2>&1 | tee /tmp/awesome-algo-update.log