.gitattributes: decrease repeating

Maybe I don't actually need to keep repeating eol=lf?

.gitattributes

@@ -5,6 +5,12 @@
 # Line normalisation, GitHub language detection
 * text=auto eol=lf linguist-detectable
 
+# Built-in diff patterns (disabled by default).
+*.css   diff=css
+*.html  diff=html
+*.php   diff=php
+*.{md,markdown} diff=markdown
+
 # These don't feel like mine
 .github/** text=auto -linguist-detectable
 css/** text=auto -linguist-detectable

.github/dependabot.yml

@@ -19,3 +19,13 @@ updates:
       github-actions:
         patterns:
           - "*"
+
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      interval: "daily"
+      timezone: "Europe/Helsinki"
+    groups:
+      github-actions:
+        patterns:
+          - "*"