Mass-replace blurb with seo:description in frontmatter

content/references/http-websocket-apis/admin-api-methods/peer-management-methods/connect.md

@@ -1,7 +1,8 @@
 ---
 html: connect.html
 parent: peer-management-methods.html
-blurb: Force the rippled server to connect to a specific peer.
+seo:
+    description: Force the rippled server to connect to a specific peer.
 labels:
   - Core Server
 ---

content/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_add.md

@@ -1,7 +1,8 @@
 ---
 html: peer_reservations_add.html
 parent: peer-management-methods.html
-blurb: Add a reserved slot for a specific peer server.
+seo:
+    description: Add a reserved slot for a specific peer server.
 labels:
   - Core Server
 ---

content/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_del.md

@@ -1,7 +1,8 @@
 ---
 html: peer_reservations_del.html
 parent: peer-management-methods.html
-blurb: Remove a reserved slot for a specific peer server.
+seo:
+    description: Remove a reserved slot for a specific peer server.
 labels:
   - Core Server
 ---

content/references/http-websocket-apis/admin-api-methods/peer-management-methods/peer_reservations_list.md

@@ -1,7 +1,8 @@
 ---
 html: peer_reservations_list.html
 parent: peer-management-methods.html
-blurb: List reserved slots for specific peer servers.
+seo:
+    description: List reserved slots for specific peer servers.
 labels:
   - Core Server
 ---

content/references/http-websocket-apis/admin-api-methods/peer-management-methods/peers.md

@@ -1,7 +1,8 @@
 ---
 html: peers.html
 parent: peer-management-methods.html
-blurb: Get information about the peer servers connected.
+seo:
+    description: Get information about the peer servers connected.
 labels:
   - Core Server
 ---