Mass-replace blurb with seo:description in frontmatter

content/tutorials/use-tokens/create-an-automated-market-maker.md

@@ -1,6 +1,7 @@
 ---
 parent: use-tokens.html
-blurb: Set up an Automated Market Maker (AMM)
+seo:
+    description: Set up an Automated Market Maker (AMM)
 embed_xrpl_js: true
 status: not_enabled
 filters:

content/tutorials/use-tokens/enable-no-freeze.md

@@ -1,7 +1,8 @@
 ---
 html: enable-no-freeze.html
 parent: use-tokens.html
-blurb: Permanently give up your account's ability to freeze tokens it issues.
+seo:
+    description: Permanently give up your account's ability to freeze tokens it issues.
 embed_xrpl_js: true
 filters:
   - interactive_steps

content/tutorials/use-tokens/enact-global-freeze.md

@@ -1,7 +1,8 @@
 ---
 html: enact-global-freeze.html
 parent: use-tokens.html
-blurb: Freeze all tokens issued by your address.
+seo:
+    description: Freeze all tokens issued by your address.
 embed_xrpl_js: true
 filters:
   - interactive_steps

content/tutorials/use-tokens/freeze-a-trust-line.md

@@ -1,7 +1,8 @@
 ---
 html: freeze-a-trust-line.html
 parent: use-tokens.html
-blurb: Freeze an individual holder of a token.
+seo:
+    description: Freeze an individual holder of a token.
 embed_xrpl_js: true
 filters:
   - interactive_steps

content/tutorials/use-tokens/issue-a-fungible-token.md

@@ -1,7 +1,8 @@
 ---
 html: issue-a-fungible-token.html
 parent: use-tokens.html
-blurb: Create your own token and issue it on the XRP Ledger Testnet.
+seo:
+    description: Create your own token and issue it on the XRP Ledger Testnet.
 embed_xrpl_js: true
 filters:
   - interactive_steps

content/tutorials/use-tokens/trade-in-the-decentralized-exchange.md

@@ -1,6 +1,7 @@
 ---
 parent: use-tokens.html
-blurb: Buy or sell fungible tokens for each other or for XRP in the decentralized exchange.
+seo:
+    description: Buy or sell fungible tokens for each other or for XRP in the decentralized exchange.
 embed_xrpl_js: true
 filters:
   - interactive_steps