Note #4166 and #4055 in Techniques change log (#4391)

Fixes #4377.

This adds 3 items to the top of the Techniques change log detailing the
1 added technique and 2 removed techniques in #4166. (I have used the
date when #4166 was merged.)

While I was at it, I remembered that #4055 also added new techniques, so
I've added 2 more list items for those.

Initially I had nested/combined list items, but upon further inspection
of the existing items in the change log, I noticed we regularly have
multiple entries with the same date, so I've now flattened the items
added by this PR to one technique per list item.

Tangentially, I also removed punctuation from one line which was
inconsistent with the rest of the top-level list.

@netlify /techniques/

---------

Co-authored-by: Mike Gower <[email protected]>

Author: kfranqueiro

_includes/techniques/changelog/21.html

@@ -1,6 +1,11 @@
 <ol>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Added {{ "F112" | linkTechniques }}</li>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Removed F4 Failure of Success Criterion 2.2.2 due to using text-decoration:blink without a mechanism to stop it in less than five seconds</li>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Removed F47 Failure of Success Criterion 2.2.2 due to using the blink element</li>
+  <li><time datetime="2025-03-07">7 Mar 2025</time>: Added {{ "G224" | linkTechniques }}</li>
+  <li><time datetime="2025-03-07">7 Mar 2025</time>: Added {{ "G225" | linkTechniques }}</li>
   <li><time datetime="2024-05-04">4 May 2024</time>: Removed F87 Failure of Success Criterion 1.3.1 due to inserting non-decorative content by using :before and :after pseudo-elements and the 'content' property in CSS</li>
-  <li><time datetime="2020-07-15">15 July 2020</time>: Removed Flash techniques.</li>
+  <li><time datetime="2020-07-15">15 July 2020</time>: Removed Flash techniques</li>
   <li><time datetime="2019-09-12">12 Sept 2019</time>: Added {{ "F105" | linkTechniques }}</li>
   <li><time datetime="2019-09-12">12 Sept 2019</time>: Added {{ "F106" | linkTechniques }}</li>
   <li><time datetime="2019-09-03">3 Sept 2019</time>: Added {{ "F104" | linkTechniques }}</li>

_includes/techniques/changelog/22.html

@@ -1,6 +1,11 @@
 <ol>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Added {{ "F112" | linkTechniques }}</li>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Removed F4 Failure of Success Criterion 2.2.2 due to using text-decoration:blink without a mechanism to stop it in less than five seconds</li>
+  <li><time datetime="2025-04-22">22 Apr 2025</time>: Removed F47 Failure of Success Criterion 2.2.2 due to using the blink element</li>
+  <li><time datetime="2025-03-07">7 Mar 2025</time>: Added {{ "G224" | linkTechniques }}</li>
+  <li><time datetime="2025-03-07">7 Mar 2025</time>: Added {{ "G225" | linkTechniques }}</li>
   <li><time datetime="2024-05-04">4 May 2024</time>: Removed F87 Failure of Success Criterion 1.3.1 due to inserting non-decorative content by using :before and :after pseudo-elements and the 'content' property in CSS</li>
-  <li><time datetime="2020-07-15">15 July 2020</time>: Removed Flash techniques.</li>
+  <li><time datetime="2020-07-15">15 July 2020</time>: Removed Flash techniques</li>
   <li><time datetime="2019-09-12">12 Sept 2019</time>: Added {{ "F105" | linkTechniques }}</li>
   <li><time datetime="2019-09-12">12 Sept 2019</time>: Added {{ "F106" | linkTechniques }}</li>
   <li><time datetime="2019-09-03">3 Sept 2019</time>: Added {{ "F104" | linkTechniques }}</li>