Fix button color in everforest and gruvbox

src/palette/everforest-dark.less

@@ -20,7 +20,7 @@
 @blue-bg:     #394f5a;
 @yellow-bg:   #4a4940;
 @button1:     #a7c080;
-@button2:     #e69875;
+@button2:     #a7c080;
 @button-red:  #e67e80;
 @key:         @red;
 @operator:    @orange;

src/palette/everforest-light.less

@@ -20,7 +20,7 @@
 @blue-bg:     #e9f0e9;
 @yellow-bg:   #faedcd;
 @button1:     #93b259;
-@button2:     #f57d26;
+@button2:     #93b259;
 @button-red:  #e66868;
 @key:         @red;
 @operator:    @orange;

src/palette/gruvbox-dark.less

@@ -20,7 +20,7 @@
 @blue-bg:     #374141;
 @yellow-bg:   #4f422e;
 @button1:     #b8bb26;
-@button2:     #fe8019;
+@button2:     #a89984;
 @button-red:  #fb4934;
 @key:         @red;
 @operator:    @orange;

src/palette/gruvbox-light.less

@@ -20,7 +20,7 @@
 @blue-bg:     #dadec0;
 @yellow-bg:   #fae7b3;
 @button1:     #79740e;
-@button2:     #af3a03;
+@button2:     #7c6f64;
 @button-red:  #9d0006;
 @key:         @red;
 @operator:    @orange;

src/palette/gruvbox-material-dark.less

@@ -20,7 +20,7 @@
 @blue-bg:     #374141;
 @yellow-bg:   #4f422e;
 @button1:     #a9b665;
-@button2:     #e78a4e;
+@button2:     #a89984;
 @button-red:  #ea6962;
 @key:         @red;
 @operator:    @orange;

src/palette/gruvbox-material-light.less

@@ -20,7 +20,7 @@
 @blue-bg:     #dadec0;
 @yellow-bg:   #fae7b3;
 @button1:     #6f8352;
-@button2:     #a96b2c;
+@button2:     #7c6f64;
 @button-red:  #ae5858;
 @key:         @red;
 @operator:    @orange;