start 2.2.1-develop

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 31d6105..111ed24 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -1,6 +1,6 @@
 module(
     name = "pico-sdk",
-    version = "2.2.0",
+    version = "2.2.1-develop",
 )
 
 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 0a35258..aca3c58 100644
--- a/pico_sdk_version.cmake
+++ b/pico_sdk_version.cmake
@@ -7,10 +7,10 @@
     set(PICO_SDK_VERSION_MINOR 2)
     # PICO_BUILD_DEFINE: PICO_SDK_VERSION_REVISION, SDK version revision, type=int, default=Current SDK revision, group=pico_base
     # PICO_CMAKE_CONFIG: PICO_SDK_VERSION_REVISION, SDK version revision, type=int, default=Current SDK revision, group=pico_base
-    set(PICO_SDK_VERSION_REVISION 0)
+    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