Package 1.21.0

Signed-off-by: mongodb-dbx-release-bot[bot] <167856002+mongodb-dbx-release-bot[bot]@users.noreply.github.com>

Author: mongodb-dbx-release-bot[bot]

phongo_version.h

@@ -22,8 +22,8 @@
  * publishing a release. */
 
 /* clang-format off */
-#define PHP_MONGODB_VERSION "1.21.0dev"
-#define PHP_MONGODB_STABILITY "devel"
+#define PHP_MONGODB_VERSION "1.21.0"
+#define PHP_MONGODB_STABILITY "stable"
 #define PHP_MONGODB_VERSION_DESC 1,21,0,0
 /* clang-format on */