Update description as shown in the RSS feed

Makefile

@@ -13,6 +13,7 @@ dev: serve rerun
 
 build:
 	cobalt build
+	./ext/add-feed-stylesheet.sh _site/feed.xml
 .PHONY: build
 
 serve:

_cobalt.yml

@@ -14,7 +14,7 @@ posts:
   default: {}
 site:
   title: fnordig
-  description: fnordig
+  description: "A blog about Rust, data and my life."
   base_url: "https://fnordig.de"
   data: ~
 template_extensions:

ext/add-feed-stylesheet.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+{
+  echo '/<?xml'
+  printf 's/>/>\\\n/\n'
+  echo i
+  echo '<?xml-stylesheet href="/feed-style.xsl" type="text/xsl"?>'
+  echo .
+  echo w
+} | ed "$*" >/dev/null