ToC: Fix a grammar error and an issue where chapters could be shuffled

Yes, I just assumed that `find` returns a nicely sorted list of files.
Now, I’m running them through `sort` to ensure the list is actually sorted.

deployment-script.sh

@@ -2,7 +2,7 @@
 cp html_resources/index_template.html index.html
 
 function genlinks {
-  for FILE in $(find . -maxdepth 1 -type f -name "*-*.html"); do
+  for FILE in $(find . -maxdepth 1 -type f -name "*-*.html" | sort); do
     echo -ne "  <li><a href=\"$FILE\">\n"
     grep -oe "<title>.*</title>" $FILE | sed -e 's/<title> /    /;s| </title>||'
     echo "  </a></li>"

html_resources/index_template.html

@@ -17,7 +17,7 @@
 <p>
   Below, in the table of contents, you find links to all the chapters.
   There is also a <a href="./notes/">collection of notes</a> that, while not
-  particularly well maintained, might be interesting (in case you missed
+  particularly well-maintained, might be interesting (in case you missed
   the link: <a href="./notes/">here</a>).
 <p>
   Table of Contents: