Fix some typos in comments (#5369)

src/backend/distributed/metadata/dependency.c

@@ -101,7 +101,7 @@ typedef struct DependencyDefinition
 		/*
 		 * address is used for dependencies that are artificially added during the
 		 * chasing. Since they are added by citus code we assume the dependency needs to
-		 * be chased anyway, ofcourse it will only actually be chased if the object is a
+		 * be chased anyway, of course it will only actually be chased if the object is a
 		 * supported object by citus
 		 */
 		ObjectAddress address;

src/backend/distributed/sql/udfs/citus_prepare_pg_upgrade/10.2-1.sql

@@ -11,7 +11,7 @@ BEGIN
     --
     -- We are dropping the aggregates because postgres 14 changed
     -- array_cat type from anyarray to anycompatiblearray. When
-    -- upgrading to pg14, spegifically when running pg_restore on
+    -- upgrading to pg14, specifically when running pg_restore on
     -- array_cat_agg we would get an error. So we drop the aggregate
     -- and create the right one on citus_finish_pg_upgrade.
 

src/backend/distributed/sql/udfs/citus_prepare_pg_upgrade/latest.sql

@@ -11,7 +11,7 @@ BEGIN
     --
     -- We are dropping the aggregates because postgres 14 changed
     -- array_cat type from anyarray to anycompatiblearray. When
-    -- upgrading to pg14, spegifically when running pg_restore on
+    -- upgrading to pg14, specifically when running pg_restore on
     -- array_cat_agg we would get an error. So we drop the aggregate
     -- and create the right one on citus_finish_pg_upgrade.