Fix spelling errors

vor 5 Jahren · cfde3abc4d
--- a/Lesson11/Lesson11.odp
+++ b/Lesson11/Lesson11.odp
--- a/Lesson11/Lesson11.pdf
+++ b/Lesson11/Lesson11.pdf
--- a/Lesson14/Lesson14.odp
+++ b/Lesson14/Lesson14.odp
--- a/Lesson14/Lesson14.pdf
+++ b/Lesson14/Lesson14.pdf