Localize the hardcoded step3/step4 wizard headings in webhttrack

The "Select URLs" and "Start" section headings on the webhttrack server
wizard were literal English, bypassing the ${LANG_...} substitution, so
they stayed English in all 30 locales. Reuse existing, already-translated
keys: step3 -> ${LANG_G44} ("Web Addresses: (URL)"), step4 -> ${LANG_J9}
("Start"). No lang/*.txt changes needed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Xavier Roche <roche@httrack.com>

html/server/step3.html

@@ -95,7 +95,7 @@ ${do:end-if}
 
 <table border="0" width="100%">
 <tr><td width="90%">
-	<h2 align="center"><em>Select URLs</em></h2>
+	<h2 align="center"><em>${LANG_G44}</em></h2>
 </td>
 ${/* show help only if available */}
 ${do:if-file-exists:html/index.html}

html/server/step4.html

@@ -77,7 +77,7 @@ ${do:end-if}
 
 <table border="0" width="100%">
 <tr><td width="90%">
-	<h2 align="center"><em>Start</em></h2>
+	<h2 align="center"><em>${LANG_J9}</em></h2>
 </td>
 ${/* show help only if available */}
 ${do:if-file-exists:html/index.html}