Change website scripts to use jstrencode

After the swap in the jparse repo of jstrencode and jstrdecode, due to
mix-up in terminology, originally in the mkiocccentry repo, the website
tools that used jstrdecode now have to use jstrencode, with a minimum
version of 2.0.0.

The scripts have been updated to do this. After doing a make install
from the jparse repo I did a make www with no html files changed. Then
doing the same thing after make install from the mkiocccentry/jparse
directory, no changes were made either, indicating that all should be
okay.

The bin/index.html was however modified to refer to jstrencode, not
jstrdecode.

bin/jfmt-wrapper.sh

@@ -8,7 +8,7 @@
 # file into a canonical style.
 #
 # NOTE: As of 2024 Sep 10 the jprint(1) tool has not been written,
-#       so jfmt-wrapper.sh uses with the jsp tool from:
+#       so jfmt-wrapper.sh uses the jsp tool from:
 #
 #	    https://github.com/kjozsa/jsp
 #