Update: Gateway LTS policy (#8355)

* LTS banner

* add LTS release policy update banner

* make vale happy

app/_assets/stylesheets/blockquote-notes.less

@@ -47,13 +47,13 @@
       padding: 15px;
       border-radius: 2px;
 
-      p {
+      p, table {
         margin-left: 24px;
       }
     }
 
     &.no-icon {
-      p {
+      p, table {
         margin-left: unset;
       }  
     }

app/_src/gateway/support/index.md

@@ -7,8 +7,45 @@ Kong adopts a structured approach to versioning its products.
 Products follow a pattern of `{MAJOR}.{MINOR}.{PATCH}.{ENTERPRISE_PATCH}`.
 The `ENTERPRISE_PATCH` segment identifies a sub-patch for {{site.ee_product_name}} based on {{site.ce_product_name}}. 
 
+This policy **only** applies to {{site.base_gateway}} and {{site.ee_product_name}}. 
+For the {{site.konnect_product_name}} version support policy, review the [{{site.konnect_product_name}} policy](/konnect/compatibility/#kong-gateway-version-compatibility).
+
 {:.note}
-> **Note**: This policy **only** applies to {{site.base_gateway}} and {{site.ee_product_name}}. For the {{site.konnect_product_name}} version support policy, review the [{{site.konnect_product_name}} policy](/konnect/compatibility/#kong-gateway-version-compatibility).
+> **Long Term Support Policy Update**
+> <br><br>
+> Beginning in March 2025, we plan to release 4 minor versions per year, every year: one in March, one in June, one in September, and the last one in December. 
+> Each year, the first version we release will become an LTS release. 
+> Starting from 3.10, we will have 1 LTS release every year, in March* of that year.
+> <br><br>
+> Example of planned LTS schedule for next 4 years:
+> <table>
+>  <thead>
+>    <th>LTS Version</th>
+>    <th>Planned release date</th>
+>  </thead>
+>  <tbody>
+>    <tr>
+>      <td>3.10</td>
+>      <td>March 2025</td>
+>    </tr>
+>    <tr>
+>      <td>3.14</td>
+>      <td>March 2026</td>
+>    </tr>
+>    <tr>
+>      <td>3.18</td>
+>      <td>March 2027</td>
+>    </tr>
+>    <tr>
+>      <td>3.22</td>
+>      <td>March 2028</td>
+>    </tr>
+>  </tbody>
+> </table>
+> Each LTS is supported for 3 years from the date of release. 
+> This will allow adjacent LTS releases to have a support overlap of 2 years in which customers can plan their upgrades.
+> <br><br>
+> _* Release timeframes are subject to change._
 
 ## Versioning
 
@@ -34,7 +71,7 @@ Due to backports, new features and breaking changes are possible at any version
 To avoid issues, do not upgrade to any new version automatically, and 
 make sure to review all relevant [changelog entries](/gateway/changelog/) before manually upgrading your deployments.
 
-### Long-term support
+### Long-term support (LTS) {#long-term-support}
 
 Kong may designate a specific minor version as a **Long-Term Support (LTS)** version. Kong provides technical support for the LTS version on a given distribution for the duration of the distribution’s lifecycle, or for 3 years from LTS version release, whichever comes sooner. An LTS version is backwards compatible within its major version sequence. An LTS version receives all security fixes. Additionally, an LTS version may receive certain non-security patches at Kong's discretion. At any time, there will be at least 1 active LTS {{site.ee_product_name}} version.