some more updates to follow TeX better for \var vs non-\var greek letters

Source: https://www.w3.org/TR/WD-math-970515/table04.html
Hat Tip: Max New

tex-table/tex-table.rkt

@@ -63,19 +63,19 @@
     ("theta" "θ")
     ("tau" "τ")
     ("beta" "β")
-    ("vartheta" "θ")
+    ("vartheta" "ϑ")
     ("pi" "π")
     ("upsilon" "υ")
     ("gamma" "γ")
-    ("varpi" "π")
+    ("varpi" "ϖ")
-    ("phi" "φ")
+    ("phi" "ϕ")
     ("delta" "δ")
     ("kappa" "κ")
     ("rho" "ρ")
-    ("varphi" "φ")
+    ("varphi" "ϕ")
     ("epsilon" "ϵ")
     ("lambda" "λ")
-    ("varrho" "ρ")
+    ("varrho" "ϱ")
     ("chi" "χ")
     ("varepsilon" "ε")
     ("mu" "μ")