fix: adjust ProjectCard layout and improve spacing in subgraph explorer documentation

Author: Le-Caignec

src/components/ProjectCard.vue

@@ -5,7 +5,7 @@
     <!-- Icon -->
     <div class="flex items-start gap-2">
       <div
-        class="border-border bg-bg flex h-14 w-14 items-center justify-center rounded-xl border overflow-hidden p-2"
+        class="border-border bg-bg flex h-14 w-14 items-center justify-center overflow-hidden rounded-xl border p-2"
       >
         <img
           v-if="iconImage"

src/overview/tooling-and-explorers/subgraph-explorer.md

@@ -80,7 +80,7 @@ protocol.
     button-rel="noreferrer"
   />
 
-  <ProjectCard
+<ProjectCard
     title="iExec DataProtector - Bellecour Mainnet"
     description="Indexes DataProtector protocol data on Bellecour mainnet, including protected data, access grants, and sharing mechanisms"
     icon-image="/assets/icons/iexec-logo.png"
@@ -92,7 +92,7 @@ protocol.
     button-target="_blank"
     button-rel="noreferrer"
   />
-  
+
   </CardGrid>
 
 ## 🔍 GraphQL Explorer Interface