chore: update the link to view notifications in the email template

[longjuan]

What type of PR is this?

/kind bug
/area core

What this PR does / why we need it:

更新邮件模板中查看通知的链接

Which issue(s) this PR fixes:

Fixes #5458

Special notes for your reviewer:

Does this PR introduce a user-facing change?

修复邮件通知中跳转到通知中心的链接错误的问题。

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.86%. Comparing base (5fdf6c0) to head (fb95f59).
Report is 43 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5459      +/-   ##
============================================
- Coverage     56.91%   56.86%   -0.05%     
- Complexity     3319     3341      +22     
============================================
  Files           587      589       +2     
  Lines         18968    19144     +176     
  Branches       1401     1394       -7     
============================================
+ Hits          10795    10887      +92     
- Misses         7594     7674      +80     
- Partials        579      583       +4     

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[ruibaby]

/lgtm

[ruibaby]

/cherry-pick release-2.13

[JohnNiang]

/approve

[f2c-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JohnNiang

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• OWNERS [JohnNiang]

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[halo-dev-bot]

@ruibaby: new pull request created: #5461

In response to this:

/cherry-pick release-2.13

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