Updated Coldark Themes - Minor color change (#109)

With some ports, some errors in the terminal were not readable. By
changing the red color, readability is improved. This update is not
unique to Prism and should not change the visual. All Coldark ports are
updated to use the correct colors.

See ArmandPhilippot/coldark-vscode#1

themes/prism-coldark-cold.css

@@ -130,7 +130,7 @@ pre[class*="language-"] {
 
 .token.deleted,
 .token.important {
-	color: #c70100;
+	color: #c22f2e;
 }
 
 .token.keyword-this,
@@ -297,7 +297,7 @@ pre[id].linkable-line-numbers span.line-numbers-rows > span:hover:before {
  */
 pre.diff-highlight > code .token.deleted:not(.prefix),
 pre > code.diff-highlight .token.deleted:not(.prefix) {
-	background-color: #c701001f;
+	background-color: #c22f2e1f;
 }
 
 pre.diff-highlight > code .token.inserted:not(.prefix),

themes/prism-coldark-dark.css

@@ -130,7 +130,7 @@ pre[class*="language-"] {
 
 .token.deleted,
 .token.important {
-	color: #f57a73;
+	color: #cd6660;
 }
 
 .token.keyword-this,
@@ -297,7 +297,7 @@ pre[id].linkable-line-numbers span.line-numbers-rows > span:hover:before {
  */
 pre.diff-highlight > code .token.deleted:not(.prefix),
 pre > code.diff-highlight .token.deleted:not(.prefix) {
-	background-color: #f57a731f;
+	background-color: #cd66601f;
 }
 
 pre.diff-highlight > code .token.inserted:not(.prefix),