feat(ListPRs): reduce heading size

so that title doesnt look out of place

__snapshots__/prs-list-list.test.js.snap

@@ -3,9 +3,9 @@
 exports[`PRs/List/List Default test 1`] = `
 <div class>
   <div class="prose">
-    <h3>
+    <h4>
       Open PRs
-    </h3>
+    </h4>
   </div>
   <ul class="divide-y divide-neutral-600">
     <li class="flex p-2 pt-4 hover:bg-neutral-700 cursor-pointer">
@@ -101,9 +101,9 @@ exports[`PRs/List/List Default test 1`] = `
 exports[`PRs/List/List Empty test 1`] = `
 <div class>
   <div class="prose">
-    <h3>
+    <h4>
       Open PRs
-    </h3>
+    </h4>
   </div>
   <p class="prose">
     None
@@ -116,9 +116,9 @@ exports[`PRs/List/List Empty test 1`] = `
 exports[`PRs/List/List Loading test 1`] = `
 <div class>
   <div class="prose">
-    <h3>
+    <h4>
       Open PRs
-    </h3>
+    </h4>
   </div>
   <ul class="divide-y divide-neutral-600">
     <li class="flex p-2 pt-4 ">
@@ -219,9 +219,9 @@ exports[`PRs/List/List No Title test 1`] = `
 exports[`PRs/List/List Partially Loaded test 1`] = `
 <div class>
   <div class="prose">
-    <h3>
+    <h4>
       Open PRs
-    </h3>
+    </h4>
   </div>
   <ul class="divide-y divide-neutral-600">
     <li class="flex p-2 pt-4 hover:bg-neutral-700 cursor-pointer">

src/lib/components/PRsList.svelte

@@ -14,7 +14,7 @@
 <div class="">
     {#if title.length > 0}
         <div class="prose">
-            <h3>{title}</h3>
+            <h4>{title}</h4>
         </div>
     {/if}
     {#if prs.length == 0 && !loading}