sponsorship: update sponsors 🙏 (#388)

Author: jemgillam

src/pages/sponsor.mdx

@@ -70,6 +70,12 @@ YOU!**
     href="https://stellate.co/"
     business
   />
+  <Sponsor
+    name="Accenture"
+    avatar="/images/sponsors/accenture.svg"
+    href="https://www.accenture.com/"
+    business
+  />
 </Sponsors>
 <Sponsors level="leaders">
   <Sponsor
@@ -158,6 +164,7 @@ YOU!**
   <Sponsor name="urtho" />
   <Sponsor name="Andrew Joseph " />
   <Sponsor name="Old Grammar" business />
+  <Sponsor name="Spear AI" business />
 </Sponsors>
 <Sponsors level="backers">
   <Sponsor name="plus 51 more backers..." plain />