add compose-comp for ∘

nixos/kblayouts/fox-compose.xcompose

@@ -186,6 +186,7 @@
 <Multi_key> <colon> <space> : "﹕ "  # latex \?
 <Multi_key> <b> <u> <l> <l> <e> <t> : "•"  # latex \bullet
 <Multi_key> <c> <i> <r> <c> : "∘"  # latex \circ
+<Multi_key> <c> <o> <m> <p> : "∘"
 <Multi_key> <t> <i> <m> <e> <s> : "×"  # latex \times
 # <Multi_key> <o> <p> <l> <u> <s> : "⊕"  # latex \oplus
 # <Multi_key> <c> <i> <r> <c> <l> <e> <d> <a> <s> <t> : "⊛"  # latex \circledast