patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/vim9.h b/src/vim9.h
index 88cc4fc..26b2080 100644
--- a/src/vim9.h
+++ b/src/vim9.h
@@ -53,7 +53,7 @@
     // ISN_STOREOTHER, // pop into other script variable isn_arg.other.
 
     ISN_STORENR,    // store number into local variable isn_arg.storenr.stnr_idx
-    ISN_STORELIST,	// store into list, value/index/varable on stack
+    ISN_STORELIST,	// store into list, value/index/variable on stack
     ISN_STOREDICT,	// store into dictionary, value/index/variable on stack
 
     ISN_UNLET,		// unlet variable isn_arg.unlet.ul_name