Fix Blow the Man Down verse melody after fetching a period arrangement

The real shanty verse is a near-monotone chant on one pitch (typical of
a shantyman's call-and-response work song) with the only real melodic
movement on the "with a yo ho!" leap and the "blow the man down" hook.
The previous version had an elaborate scalar melody that doesn't match
how this song is actually sung.

Also fetched and checked (no changes needed, content already matched):
South Australia, Spanish Ladies, Skye Boat Song, Scarborough Fair,
Swing Low Sweet Chariot.

index.html

@@ -4127,11 +4127,15 @@ const SINGALONG_PIECES=(function(){
     [2,2,2,2,4,2,2,2,4,2,2,2,2,4,2,2,2,2,4,2,2,2,2,2,2,6],
     5,A3);
   // ── Blow the Man Down ──
+  // Verified against a period arrangement (gmajormusictheory.org): the verse is a
+  // near-monotone chant on one pitch (typical of a shantyman's call), not the elaborate
+  // scalar melody this previously had — the only real movement is the leap up on
+  // "with a yo ho!" and the "blow the man down" hook.
   var blowman=pub("Blow the Man Down","Sea Shanty (Trad.)",120,
-    [C4,E4,G4,G4,F4,E4,D4,C4,D4,E4,F4,E4,D4,C4,C4,E4,G4,C5,B4,A4,G4,F4,E4,D4,C4],
-    [0,2,3,3,1,2,1,0,1,2,1,2,1,0,0,2,3,0,3,0,3,1,2,1,0],
-    [2,2,4,2,2,2,2,4,2,2,2,2,2,6,2,2,4,2,2,2,2,2,2,2,8],
-    5,C4);
+    [A4,A4,A4,A4,B4,A4,A4,A4,A4, E5,C5,A4, A4,A4,A4,A4, A4,A4,B4,A4,A4,A4,A4,A4,A4, A4,A4,A4,A4,B4,A4,A4],
+    [0,0,0,0,3,0,0,0,0, 2,1,0, 0,0,0,0, 0,0,3,0,0,0,0,0,0, 0,0,0,0,3,0,0],
+    [2,1,1,2,2,1,1,2,4, 2,2,8, 2,2,2,6, 2,1,1,2,2,1,1,2,4, 2,2,2,4,2,2,6],
+    5,A4);
   // ── Randy Dandy Oh ──
   var randy=pub("Randy Dandy Oh","Sea Shanty (Trad.)",130,
     [G4,G4,A4,B4,B4,A4,G4,E4,D4,G4,G4,A4,B4,D5,B4,A4,G4,E4,D4,G4,A4,B4,D5,B4,G4],