appdata: translate=no properties

It appears that the appstream project no longer supports
`translatable=no` properties, and gettext extract the
`translatable=no` marked strings as translatable.

I opened an issue to inform about the situation, but `translatable=no`
properties are not accepted by developers. You can find the issue
here: ximion/appstream#623

**Please test your script or string extraction process
before merging this PR.**

> In MetaInfo files, each individual paragraph of a description
> (or enumerated entry) is translated individually, however,
> you can only exclude the complete block from being translated
> by adding `translate="no"` to the description element.

Source: https://freedesktop.org/software/appstream/docs/sect-Quickstart-Translation.html

data/com.rafaelmardojai.SharePreview.metainfo.xml.in.in

@@ -28,7 +28,7 @@
   <content_rating type="oars-1.1" />
   <releases>
     <release version="0.4.0" date="2023-09-29">
-      <description translatable="no">
+      <description translate="no">
         <ul>
           <li>Allow opening multiple instances of the app</li>
           <li>Support for Discourse previews</li>
@@ -38,7 +38,7 @@
       </description>
     </release>
     <release version="0.3.0" date="2023-03-23">
-      <description translatable="no">
+      <description translate="no">
         <ul>
           <li>New scraping logger feature</li>
           <li>Save last selected social platform</li>
@@ -50,7 +50,7 @@
       </description>
     </release>
     <release version="0.2.0" date="2022-03-27">
-      <description translatable="no">
+      <description translate="no">
         <ul>
           <li>New page data dialog</li>
           <li>Bug fixes</li>
@@ -60,7 +60,7 @@
       </description>
     </release>
     <release version="0.1.2" date="2021-05-25">
-      <description translatable="no">
+      <description translate="no">
         <ul>
           <li>Bug fixes</li>
           <li>Added Turkish translation</li>
@@ -70,12 +70,12 @@
       </description>
     </release>
     <release version="0.1.1" date="2021-05-23">
-      <description translatable="no">
+      <description translate="no">
         <p>Bug fixes and improvements.</p>
       </description>
     </release>
     <release version="0.1.0" date="2021-05-21">
-      <description translatable="no">
+      <description translate="no">
         <p>First public release.</p>
       </description>
     </release>
@@ -97,9 +97,9 @@
     <control>touch</control>
   </recommends>
   <!-- developer_name tag deprecated with Appstream 1.0 -->
-  <developer_name translatable="no">Rafael Mardojai CM</developer_name>
+  <developer_name translate="no">Rafael Mardojai CM</developer_name>
   <developer id="com.mardojai">
-    <name translatable="no">Rafael Mardojai CM</name>
+    <name translate="no">Rafael Mardojai CM</name>
   </developer>
   <update_contact>[email protected]</update_contact>
   <translation type="gettext">@gettext-package@</translation>