SDK 2.3.1 Release

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 873f618..03f5f0f 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -1,6 +1,6 @@
 module(
     name = "pico-sdk",
-    version = "2.3.1-develop",
+    version = "2.3.1",
 )
 
 bazel_dep(name = "platforms", version = "0.0.9")

pico_sdk_version.cmake

diff --git a/pico_sdk_version.cmake b/pico_sdk_version.cmake
index 7fd614a..f45f947 100644
--- a/pico_sdk_version.cmake
+++ b/pico_sdk_version.cmake
@@ -10,7 +10,7 @@
     set(PICO_SDK_VERSION_REVISION 1)
     # PICO_BUILD_DEFINE: PICO_SDK_VERSION_PRE_RELEASE_ID, Optional SDK pre-release version identifier, default=Current SDK pre-release identifier, type=string, group=pico_base
     # PICO_CMAKE_CONFIG: PICO_SDK_VERSION_PRE_RELEASE_ID, Optional SDK pre-release version identifier, default=Current SDK pre-release identifier, type=string, group=pico_base
-    set(PICO_SDK_VERSION_PRE_RELEASE_ID develop)
+    # set(PICO_SDK_VERSION_PRE_RELEASE_ID develop)
 endif()
 
 # PICO_BUILD_DEFINE: PICO_SDK_VERSION_STRING, SDK version string, type=string, default=Current SDK version string, group=pico_base