🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

.kokoro/requirements.txt

@@ -10,9 +10,9 @@ attrs==22.1.0 \
     # via
     #   -r requirements.in
     #   gcp-releasetool
-cachetools==5.2.0 \
-    --hash=sha256:6a94c6402995a99c3970cc7e4884bb60b4a8639938157eeed436098bf9831757 \
-    --hash=sha256:f9f17d2aec496a9aa6b76f53e3b614c965223c061982d434d160f930c698a9db
+cachetools==4.2.4 \
+    --hash=sha256:89ea6f1b638d5a73a4f9226be57ac5e4f399d22770b92355f92dcb0f7f001693 \
+    --hash=sha256:92971d3cb7d2a97efff7c7bb1657f21a8f5fb309a37530537c71b1774189f2d1
     # via
     #   -r requirements.in
     #   google-auth

README.md

@@ -57,13 +57,13 @@ implementation 'com.google.cloud:google-cloud-texttospeech'
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-texttospeech:2.4.4'
+implementation 'com.google.cloud:google-cloud-texttospeech:2.4.6'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-texttospeech" % "2.4.4"
+libraryDependencies += "com.google.cloud" % "google-cloud-texttospeech" % "2.4.6"
 ```
 
 ## Authentication