Update scripts/spl-token-cli-version.sh with latest SPL Token CLI version (#1823)

Update splTokenCliVersion to latest spl token cli release version

scripts/spl-token-cli-version.sh

@@ -1,5 +1,5 @@
 # populate this on the stable branch
-splTokenCliVersion=
+splTokenCliVersion=3.4.1
 
 maybeSplTokenCliVersionArg=
 if [[ -n "$splTokenCliVersion" ]]; then