Update the version number to 1.3.20
diff --git a/doxygen/mbedtls.doxyfile b/doxygen/mbedtls.doxyfile
index 15df942..aabc413 100644
--- a/doxygen/mbedtls.doxyfile
+++ b/doxygen/mbedtls.doxyfile
@@ -28,7 +28,7 @@
# identify the project. Note that if you do not use Doxywizard you need
# to put quotes around the project name if it contains spaces.
-PROJECT_NAME = "mbed TLS v1.3.19"
+PROJECT_NAME = "mbed TLS v1.3.20"
# The PROJECT_NUMBER tag can be used to enter a project or revision number.
# This could be handy for archiving the generated documentation or