chore: add Saasify theme (#509)

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Co-authored-by: Sidharth R <122173059+hugo-sid@users.noreply.github.com>

themes.txt

@@ -26,7 +26,6 @@ github.com/alloydwhitlock/huey
 github.com/AmazingRise/hugo-theme-diary
 github.com/ameio/hugo-arogya-theme
 github.com/AminZibayi/Corporio
-github.com/ananthb/jughead
 github.com/AngeloStavrow/indigo
 github.com/ANSSI-FR/hackropole-hugo
 github.com/antedoro/arberia
@@ -67,6 +66,7 @@ github.com/cathelijne/hugo-theme-huguette
 github.com/cboettig/hugo-now-ui
 github.com/cdeck3r/OneDly-Theme
 github.com/cfrome77/hugo-theme-sky
+github.com/chaoming/hugo-saasify-theme
 github.com/chaitanya4vedi/navada
 github.com/chipsenkbeil/grid-side
 github.com/chipzoller/hugo-clarity