patch 8.2.1700: Vim9: try/catch causes wrong value to be returned

Problem:    Vim9: try/catch causes wrong value to be returned.
Solution:   Reset tcd_return. (closes #6964)
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 7c8f779..40d6193 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -1922,6 +1922,7 @@
 		    trycmd->tcd_catch_idx = iptr->isn_arg.try.try_catch;
 		    trycmd->tcd_finally_idx = iptr->isn_arg.try.try_finally;
 		    trycmd->tcd_caught = FALSE;
+		    trycmd->tcd_return = FALSE;
 		}
 		break;