theme: Make github match github.com more closely

This is a slight divergence from the VSCode theme, but it's more
accurate.

https://github.com/primer/github-vscode-theme/issues/111
https://github.com/primer/github-vscode-theme/issues/88

runtime/themes/github_dark.toml

@@ -9,9 +9,9 @@ keyword = "scale.red.3"
 namespace = "scale.orange.2"
 punctuation = "fg.default"
 "punctuation.delimiter" = "fg.default"
-operator = "scale.red.3"
+operator = "scale.blue.1"
 special = "scale.blue.1"
-"variable.other.member" = "fg.default"
+"variable.other.member" = "scale.blue.1"
 variable = "fg.default"
 "variable.parameter" = "scale.orange.2"
 "variable.builtin" = "scale.red.3"

runtime/themes/github_light.toml

@@ -9,9 +9,9 @@ keyword = "scale.red.5"
 namespace = "scale.orange.6"
 punctuation = "fg.default"
 "punctuation.delimiter" = "fg.default"
-operator = "scale.red.5"
+operator = "scale.blue.8"
 special = "scale.blue.8"
-"variable.other.member" = "fg.default"
+"variable.other.member" = "scale.blue.8"
 variable = "fg.default"
 "variable.parameter" = "scale.orange.6"
 "variable.builtin" = "scale.red.5"