fix(ellipsis): content could be undefined

[afc163]

close #5726

[github-actions]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-5727.surge.sh

[github-actions]

Size Change: +6 B (0%)

Total Size: 350 kB

Filename	Size	Change
./lib/bundle/antd-mobile.compatible.umd.js	188 kB	+3 B (0%)
./lib/bundle/antd-mobile.umd.js	146 kB	+3 B (0%)

ℹ️ View Unchanged

Filename	Size
./lib/bundle/css-vars-patch.css	1.4 kB
./lib/bundle/style.css	14.6 kB

_{compressed-size-action}

[codecov]

Codecov Report

Base: 89.91% // Head: 90.02% // Increases project coverage by +0.11% 🎉

Coverage data is based on head (d85bf53) compared to base (235b525).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5727      +/-   ##
==========================================
+ Coverage   89.91%   90.02%   +0.11%     
==========================================
  Files         297      297              
  Lines        6339     6339              
  Branches     1554     1554              
==========================================
+ Hits         5700     5707       +7     
+ Misses        590      584       -6     
+ Partials       49       48       -1     

Impacted Files	Coverage Δ
src/components/ellipsis/ellipsis.tsx	99.13% <ø> (ø)
src/components/image-uploader/image-uploader.tsx	92.72% <0.00%> (+6.36%)	⬆️

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[awmleer]

LGTM

[github-actions]

Deploy PR preview failed.

[github-actions]

Deploy PR preview failed.

[KingAmo]

请问什么时候发新版本呢