fix maps examples #83

Job	Run time
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 14s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 56s
semver	42s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	7m 46s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 33s
Build Wasm Examples (basic)	56s
Code Coverage	17s
Rustfmt	19s
Build Wasm Examples (callback-example)	53s
Build Book	3m 32s
Clippy	3m 11s
Build Examples (basic_charts)	42s
Build Examples (custom_controls)	36s
Build Examples (images)	53s
Build Examples (3d_charts)	30s
Build Examples (customization/multiple_plots_example)	33s
Build Examples (kaleido)	1m 28s
Build Examples (customization/density_mapbox_example)	32s
Build Examples (financial_charts)	36s
Build Examples (maps)	42s
Build Examples (scientific_charts)	28s
Build Examples (shapes)	28s
Build Examples (ndarray)	30s
Build Examples (themes)	32s
Build Examples (customization/consistent_static_format_export)	1m 29s
Build Examples (statistical_charts)	36s
Build Examples (subplots)	33s
	39m 27s

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