Update Error Prone compatibility matrix

Author: Stephan202

website/_data/compatibility.yml

@@ -1,8 +1,17 @@
 # An overview of Error Prone Support releases, along with compatible Error
 # Prone releases. This data was generated by `generate-version-compatibility-overview.sh`.
 releases:
+  - version: 0.26.0
+    compatible:
+      - "2.43.0"
+      - "2.42.0"
+      - "2.41.0"
+      - "2.40.0"
+      - "2.39.0"
+      - "2.38.0"
   - version: 0.25.0
     compatible:
+      - "2.43.0"
       - "2.42.0"
       - "2.41.0"
       - "2.40.0"
@@ -16,6 +25,7 @@ releases:
       - "2.38.0"
   - version: 0.23.0
     compatible:
+      - "2.41.0"
       - "2.40.0"
       - "2.39.0"
       - "2.38.0"