Fix organizations typo

Signed-off-by: taur1ne <[email protected]>
(cherry picked from commit 6334d22)

docs/source/membership/membership.md

@@ -65,7 +65,7 @@ The channel MSP defines the _relationship_ between the identities of channel mem
 
 **Every organization participating in a channel must have an MSP defined for it**. In fact, it is recommended that there is a one-to-one mapping between organizations and MSPs. The MSP defines which members are empowered to act on behalf of the organization. This includes configuration of the MSP itself as well as approving administrative tasks that the organization has role, such as adding new members to a channel. If all network members were part of a single organization or MSP, data privacy is sacrificed. Multiple organizations facilitate privacy by segregating ledger data to only channel members. If more granularity is required within an organization, the organization can be further divided into organizational units (OUs) which we describe in more detail later in this topic.
 
-**The system channel MSP includes the MSPs of all the organizations that participate in an ordering service.** An ordering service will likely include ordering nodes from multiple organizaitons and collectively these organizations run the ordering service, most importantly managing the consortium of organizations and the default policies that are inherited by the application channels.
+**The system channel MSP includes the MSPs of all the organizations that participate in an ordering service.** An ordering service will likely include ordering nodes from multiple organizations and collectively these organizations run the ordering service, most importantly managing the consortium of organizations and the default policies that are inherited by the application channels.
 
 **Local MSPs are only defined on the file system of the node or user** to which they apply. Therefore, physically and logically there is only one local MSP per
 node. However, as channel MSPs are available to all nodes in the channel, they are logically defined once in the channel configuration. However, **a channel MSP is also instantiated on the file system of every node in the channel and kept synchronized via consensus**. So while there is a copy of each channel MSP on the local file system of every node, logically a channel MSP resides on and is maintained by the channel or the network.