patch 9.0.1808: termdebug: Typo in termdebug test

Problem:  termdebug: Typo in termdebug test
Solution: fix the typos

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_termdebug.vim b/src/testdir/test_termdebug.vim
index 16d0004..49c84cf 100644
--- a/src/testdir/test_termdebug.vim
+++ b/src/testdir/test_termdebug.vim
@@ -9,12 +9,12 @@
 
 let g:GDB = exepath('gdb')
 if g:GDB->empty()
-  throw 'Skpped: gdb is not found in $PATH'
+  throw 'Skipped: gdb is not found in $PATH'
 endif
 
 let g:GCC = exepath('gcc')
 if g:GCC->empty()
-  throw 'Skpped: gcc is not found in $PATH'
+  throw 'Skipped: gcc is not found in $PATH'
 endif
 
 packadd termdebug