Slides/211 add rust role to material prefix #2229

Job	Run time
Contrib scripts check	1m 13s
Labs (ubuntu-latest)	55s
Labs-Slides	59s
List-Courses	2s
Python scripts black lint check	6s
Slides (gnat_studio)	1m 33s
Slides (gnatsas)	2m 33s
Slides (static_analysis_via_compiler)	1m 27s
Slides (toolchain)	1m 9s
Slides (spark_for_ada_programmers)	2m 54s
Slides (advanced_exception_analysis)	1m 23s
Slides (rust_essentials)	1m 29s
Slides (fundamentals_of_ada)	8m 52s
Slides (gnatdas)	2m 55s
Slides (gnat_project_facility)	2m 27s
Slides (gnat_studio/course.txt)	1m 26s
Slides (toolchain/gnat_toolchain.txt)	1m 7s
Slides (spark_for_ada_programmers/course.txt)	1m 50s
Slides (rust_essentials/standard_course.txt)	1m 30s
Slides (fundamentals_of_ada/advanced.txt)	2m 11s
Slides (fundamentals_of_ada/opat.txt)	2m 21s
Slides (fundamentals_of_ada/standard_course.txt)	2m 58s
Slides (gnat_project_facility/standard_course.txt)	2m 7s
	45m 27s

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