chore: Change copy to Edit chart in Dashboard dropdown

[geido]

SUMMARY

As shown in the screenshot

BEFORE

AFTER

TESTING INSTRUCTIONS

1. Go to a Dashboard
2. Open the dropdown
3. Make sure the copy is right

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #20032 (b2a4417) into master (4435e53) will decrease coverage by 0.04%.
The diff coverage is n/a.

❗ Current head b2a4417 differs from pull request most recent head a45021b. Consider uploading reports for the commit a45021b to get more accurate results

@@            Coverage Diff             @@
##           master   #20032      +/-   ##
==========================================
- Coverage   66.37%   66.33%   -0.05%     
==========================================
  Files        1715     1713       -2     
  Lines       64179    64083      -96     
  Branches     6753     6734      -19     
==========================================
- Hits        42602    42509      -93     
- Misses      19859    19863       +4     
+ Partials     1718     1711       -7     

Flag	Coverage Δ
javascript	51.27% <ø> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...dashboard/components/SliceHeaderControls/index.tsx	66.25% <ø> (+2.39%)	⬆️
...set-frontend/src/components/ReportModal/styles.tsx	87.87% <0.00%> (-12.13%)	⬇️
...ns/legacy-plugin-chart-map-box/src/controlPanel.ts	25.00% <0.00%> (-8.34%)	⬇️
...rc/explore/components/ExploreChartHeader/index.jsx	43.10% <0.00%> (-8.25%)	⬇️
...rset-frontend/src/explore/exploreUtils/formData.ts	85.71% <0.00%> (-3.18%)	⬇️
superset-frontend/src/reports/actions/reports.js	36.36% <0.00%> (-3.04%)	⬇️
superset/examples/helpers.py	80.00% <0.00%> (-2.61%)	⬇️
...explore/components/controls/ColorPickerControl.jsx	86.66% <0.00%> (-1.57%)	⬇️
...ols/FilterControl/AdhocFilterEditPopover/index.jsx	68.18% <0.00%> (-1.39%)	⬇️
superset-frontend/src/views/CRUD/hooks.ts	46.15% <0.00%> (-1.16%)	⬇️
... and 80 more

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[stephenLYZ]

LGTM.