Harmonize subject of mailto links

apps/client/src/app/pages/faq/saas/saas-page.html

@@ -96,7 +96,7 @@
         </mat-card-header>
         <mat-card-content
           >Request your student discount
-          <a href="mailto:hi@ghostfol.io?Subject=Student Discount">here</a> with
+          <a href="mailto:hi@ghostfol.io?subject=Student Discount">here</a> with
           your university e-mail address.</mat-card-content
         >
       </mat-card>

apps/client/src/app/pages/pricing/pricing-page.html

@@ -332,7 +332,7 @@
           }
           <ng-container i18n>please</ng-container>
           <ng-container>&nbsp;</ng-container>
-          <a href="mailto:hi@ghostfol.io?Subject=Referral link for..." i18n
+          <a href="mailto:hi@ghostfol.io?subject=Referral link for..." i18n
             >contact us</a
           >
           <ng-container>&nbsp;</ng-container>
@@ -343,7 +343,7 @@
           <ng-container>&nbsp;</ng-container>
           <ng-container i18n>Request it</ng-container>
           <ng-container>&nbsp;</ng-container>
-          <a href="mailto:hi@ghostfol.io?Subject=Student Discount" i18n>here</a>
+          <a href="mailto:hi@ghostfol.io?subject=Student Discount" i18n>here</a>
           <ng-container>&nbsp;</ng-container>
           <ng-container i18n>with your university e-mail address</ng-container>.
         </p>