Fix spacing #3645

Job	Run time
Labs-Slides	58s
Contrib scripts check	1m 17s
List-Courses	5s
Python scripts black lint check	8s
Labs (ubuntu-latest)	54s
Slides (gnatsas)	4m 54s
Slides (advanced_exception_analysis)	1m 42s
Slides (misc_tools)	2m 1s
Slides (static_analysis_via_compiler)	1m 56s
Slides (ada_essentials)	22m 47s
Slides (gnat_project_facility)	2m 57s
Slides (rust_essentials)	8m 37s
Slides (toolchain)	1m 59s
Slides (gnatdas)	4m 20s
Slides (ada_essentials/advanced.txt)	4m 4s
Slides (ada_essentials/standard_course.txt)	4m 26s
Slides (spark_essentials)	6m 31s
Slides (gnat_studio)	2m 15s
Slides (rust_essentials/standard_course.txt)	2m 50s
Slides (spark_essentials/standard_course.txt)	3m 23s
Slides (rust_essentials/comprehensive_course.txt)	3m 2s
Slides (gnat_project_facility/standard_course.txt)	1m 57s
Slides (gnatsas/standard_course.txt)	2m 16s
Slides (toolchain/gnat_toolchain.txt)	1m 52s
Slides (gnatdas/standard_course.txt)	2m 14s
Slides (gnat_studio/course.txt)	1m 55s
	1h 31m 20s

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