Finish reverting 3eda9fc0.

Commit 67c33a11 should have set v14's catversion back to what it was
before 3eda9fc0, to avoid forcing a useless pg_upgrade cycle on users
of 14beta3.  Do that now.

Discussion: https://postgr.es/m/2598498.1630702074@sss.pgh.pa.us

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	202109031
+#define CATALOG_VERSION_NO	202107181
 
 #endif