fix misleading typo hasActiveChildProcess doc comment (#7588)

and a misspell in rax.c

src/rax.c

@@ -554,7 +554,7 @@ int raxGenericInsert(rax *rax, unsigned char *s, size_t len, void *data, void **
      *
      * Splitting a compressed node have a few possible cases.
      * Imagine that the node 'h' we are currently at is a compressed
-     * node contaning the string "ANNIBALE" (it means that it represents
+     * node containing the string "ANNIBALE" (it means that it represents
      * nodes A -> N -> N -> I -> B -> A -> L -> E with the only child
      * pointer of this node pointing at the 'E' node, because remember that
      * we have characters at the edges of the graph, not inside the nodes

src/server.c

@@ -1479,7 +1479,7 @@ void updateDictResizePolicy(void) {
         dictDisableResize();
 }
 
-/* Return true if there are no active children processes doing RDB saving,
+/* Return true if there are active children processes doing RDB saving,
  * AOF rewriting, or some side process spawned by a loaded module. */
 int hasActiveChildProcess() {
     return server.rdb_child_pid != -1 ||