Switch to simpler theme

Author: slimslenderslacks

.gitmodules

@@ -1,7 +1,3 @@
-[submodule "docs/quickstart/themes/ananke"]
-	path = docs/themes/ananke
-	url = https://github.com/theNewDynamic/gohugo-theme-ananke.git
-[submodule "docs/themes/blowfish"]
-	path = docs/themes/blowfish
-	url = https://github.com/nunocoracao/blowfish.git
-	branch = main
+[submodule "docs/themes/hextra"]
+	path = docs/themes/hextra
+	url = [email protected]:imfing/hextra