Updated the style guide #3671

Job	Run time
Contrib scripts check	1m 24s
Labs-Slides	1m 6s
Labs (ubuntu-latest)	45s
Python scripts black lint check	11s
List-Courses	3s
Slides (toolchain)	2m 1s
Slides (gnatsas)	5m 22s
Slides (spark_essentials)	6m 19s
Slides (advanced_exception_analysis)	2m 3s
Slides (gnatdas)	5m 2s
Slides (gnat_project_facility)	3m 13s
Slides (ada_essentials)	22m 22s
Slides (gnat_studio)	2m 38s
Slides (rust_essentials/comprehensive_course.txt)	3m 6s
Slides (rust_essentials)	8m 48s
Slides (rust_essentials/standard_course.txt)	2m 30s
Slides (gnatsas/standard_course.txt)	2m 28s
Slides (misc_tools)	1m 25s
Slides (gnat_studio/course.txt)	1m 48s
Slides (ada_essentials/standard_course.txt)	4m 7s
Slides (toolchain/gnat_toolchain.txt)	1m 51s
Slides (spark_essentials/standard_course.txt)	2m 55s
Slides (gnatdas/standard_course.txt)	2m 6s
Slides (gnat_project_facility/standard_course.txt)	1m 57s
Slides (static_analysis_via_compiler)	1m 51s
Slides (ada_essentials/advanced.txt)	3m 48s
	1h 31m 9s

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