change inventory layout for year level index.html files

The "Jump to top" in the inventory section of an entry index.html file
now is below the secondary file list, with a short line above it.

Changed `bin/output-year-index.sh` VERSION from "1.3 2024-04-15"
to "1.4 2024-04-21".

Run `make gen_year_index` to perform the above.

bin/output-year-index.sh

@@ -108,7 +108,7 @@ shopt -s globstar	# enable ** to match all files and zero or more directories an
 
 # set variables referenced in the usage message
 #
-export VERSION="1.3 2024-04-15"
+export VERSION="1.4 2024-04-21"
 NAME=$(basename "$0")
 export NAME
 export V_FLAG=0
@@ -659,7 +659,8 @@ fi
 #
 {
     echo
-    echo ' **Jump to:** [top](#)'
+    echo '<hr style="width:10%;text-align:left;margin-left:0">'
+    echo '<h4>Jump to: <a href="#">top</a></h4>'
     echo
 } | if [[ -z $NOOP ]]; then
     cat >> "$TMP_FILE"