Website: Add note to website forms (#14138)

Closes: https://github.com/fleetdm/confidential/issues/348
Changes:
- Added a note about spam to forms on the /device-management, /contact,
and /upgrade pages.

website/assets/styles/pages/contact.less

@@ -4,6 +4,14 @@
     font-weight: 700;
     font-size: 18px;
   }
+  a {
+    font-size: 14px;
+    color: @core-vibrant-blue;
+    text-decoration: underline;
+  }
+  input {
+    border-radius: 8px;
+  }
 
   .btn-primary {
     background-color: #ff5c83;

website/assets/styles/pages/fleet-mdm.less

@@ -30,6 +30,11 @@
     font-size: 16px;
     line-height: 24px;
   }
+  a {
+    font-size: 14px;
+    color: @core-vibrant-blue;
+    text-decoration: underline;
+  }
 
   [purpose='hero-background'] {
     background: linear-gradient(180deg, #E8F1F7 3.37%, #FFFFFF 60%);

website/assets/styles/pages/upgrade.less

@@ -27,6 +27,12 @@
     line-height: 24px;
     margin-bottom: 16px;
   }
+  a {
+    font-size: 14px;
+    color: @core-vibrant-blue;
+    text-decoration: underline;
+  }
+
   [purpose='feature'] {
     img {
       margin-left: auto;

website/views/pages/contact.ejs

@@ -47,6 +47,7 @@
           <ajax-button type="submit" :syncing="syncing" class="btn btn-primary btn-sm">Submit</ajax-button>
         </div>
       </ajax-form>
+      <p class="mb-0 mt-4 pt-3"><a href="/handbook/company/why-this-way#why-dont-we-sell-like-everyone-else" target="_blank">We will never spam you</a>.</p>
     </div>
     <div style="max-width: 725px;" class="mx-auto text-center" v-else>
       <h2>Thank you, {{formData.firstName}}!</h2>

website/views/pages/fleet-mdm.ejs

@@ -117,6 +117,7 @@
             <ajax-button purpose="submit-button" spinner="true" type="submit" :syncing="syncing" class="btn btn-sm btn-block btn-primary">Submit</ajax-button>
           </div>
         </ajax-form>
+        <p class="mb-0 mt-4"><a href="/handbook/company/why-this-way#why-dont-we-sell-like-everyone-else" target="_blank">We will never spam you</a>.</p>
       </div>
       <div purpose="modal-form" class="text-center" v-else>
         <h2 class="mb-2">Thank you!</h2>

website/views/pages/upgrade.ejs

@@ -95,6 +95,7 @@
               <ajax-button purpose="submit-button" spinner="true" type="submit" :syncing="syncing" class="btn btn-sm btn-block btn-primary">Submit</ajax-button>
             </div>
           </ajax-form>
+          <p class="mb-0 mt-4 pt-3"><a href="/handbook/company/why-this-way#why-dont-we-sell-like-everyone-else" target="_blank">We will never spam you</a>.</p>
         </div>
         <%// Form success state %>
         <div purpose="upgrade-form" v-else>