Upgrade echarts for XSS CVE

[hardillb]

Description

Bump echarts to 6.1.0 and vue-echarts to 8.0.1

Tested and performance view looks the same as before

Related Issue(s)

https://github.com/FlowFuse/flowfuse/security/dependabot/326

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production
• Link to Changelog Entry PR, or note why one is not needed.

Labels

• Includes a DB migration? -> add the area:migration label

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.36%. Comparing base (fd8dabc) to head (bec732d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7657   +/-   ##
=======================================
  Coverage   75.35%   75.36%           
=======================================
  Files         425      425           
  Lines       22492    22492           
  Branches     5933     5933           
=======================================
+ Hits        16949    16950    +1     
+ Misses       5543     5542    -1     

Flag	Coverage Δ
backend	75.36% <ø> (+<0.01%)	⬆️

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