Add back-compat indices for 8.8.1
diff --git a/lucene/backward-codecs/src/test/org/apache/lucene/index/TestBackwardsCompatibility.java b/lucene/backward-codecs/src/test/org/apache/lucene/index/TestBackwardsCompatibility.java
index c4006e1..02c4821 100644
--- a/lucene/backward-codecs/src/test/org/apache/lucene/index/TestBackwardsCompatibility.java
+++ b/lucene/backward-codecs/src/test/org/apache/lucene/index/TestBackwardsCompatibility.java
@@ -348,7 +348,9 @@
     "8.7.0-cfs",
     "8.7.0-nocfs",
     "8.8.0-cfs",
-    "8.8.0-nocfs"
+    "8.8.0-nocfs",
+    "8.8.1-cfs",
+    "8.8.1-nocfs"
   };
 
   public static String[] getOldNames() {
@@ -386,7 +388,8 @@
     "sorted.8.6.2",
     "sorted.8.6.3",
     "sorted.8.7.0",
-    "sorted.8.8.0"
+    "sorted.8.8.0",
+    "sorted.8.8.1"
   };
 
   public static String[] getOldSortedNames() {
diff --git a/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-cfs.zip b/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-cfs.zip
new file mode 100644
index 0000000..1bc3781
--- /dev/null
+++ b/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-cfs.zip
Binary files differ
diff --git a/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-nocfs.zip b/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-nocfs.zip
new file mode 100644
index 0000000..f8ffd10
--- /dev/null
+++ b/lucene/backward-codecs/src/test/org/apache/lucene/index/index.8.8.1-nocfs.zip
Binary files differ
diff --git a/lucene/backward-codecs/src/test/org/apache/lucene/index/sorted.8.8.1.zip b/lucene/backward-codecs/src/test/org/apache/lucene/index/sorted.8.8.1.zip
new file mode 100644
index 0000000..303c5ae
--- /dev/null
+++ b/lucene/backward-codecs/src/test/org/apache/lucene/index/sorted.8.8.1.zip
Binary files differ