Fix i_custom_asm codepoint

[why]
The new asm icon replaces the apple icon.
I believe this has been entered as offset by mistake.

[how]
Add new icon to bottom.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

src/svgs/icons.tsv

@@ -84,7 +84,6 @@
 056		i_custom_emacs				emacs_nf.svg
 057		i_custom_orgmode			orgmode_nf.svg
 058		i_custom_kotlin				kotlin_nf.svg
-59		i_custom_asm				asm_nf.svg
 058		i_seti_kotlin
 059		i_seti_apple				apple.svg
 060		i_seti_argdown				argdown.svg
@@ -207,3 +206,4 @@
 174		i_seti_yml				yml.svg
 175		i_seti_zig				zig.svg
 176		i_seti_zip				zip.svg
+177		i_custom_asm				asm_nf.svg