Fix for typo #2111

Job	Run time
List-Courses	2s
Python scripts black lint check	8s
Labs (ubuntu-latest)	51s
Labs-Slides	1m 5s
Contrib scripts check	1m 14s
Slides (static_analysis_via_compiler)	1m 8s
Slides (fundamentals_of_ada)	9m 13s
Slides (gnat_project_facility)	1m 33s
Slides (gnat_studio)	1m 17s
Slides (toolchain)	1m 13s
Slides (gnatsas)	2m 21s
Slides (gnatdas)	2m 9s
Slides (spark_for_ada_programmers)	3m 0s
Slides (advanced_exception_analysis)	1m 11s
Slides (fundamentals_of_ada/opat.txt)	2m 6s
Slides (fundamentals_of_ada/standard_course.txt)	2m 8s
Slides (fundamentals_of_ada/advanced.txt)	1m 59s
Slides (gnat_project_facility/standard_course.txt)	1m 17s
Slides (gnat_studio/course.txt)	1m 16s
Slides (toolchain/gnat_toolchain.txt)	1m 12s
Slides (spark_for_ada_programmers/course.txt)	1m 36s
	37m 59s

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