docs: fix spelling and grammar (#13862)

Fixed various spelling errors and grammatical issues across multiple .mdx documentation files.

www/apps/resources/app/infrastructure-modules/caching/guides/memcached/page.mdx

@@ -495,9 +495,9 @@ class MemcachedCachingProviderService implements ICachingProviderService {
       const tagResult = tagResults[i]
       
       if (tagResult.value) {
-        const currrentTag = tagResult.value.toString()
+        const currentTag = tagResult.value.toString()
         // If the namespace has changed since the key was stored, it's invalid
-        if (currrentTag !== storedTags[tag]) {
+        if (currentTag !== storedTags[tag]) {
           return false
         }
       } else {

www/apps/resources/app/infrastructure-modules/file/local/page.mdx

@@ -78,7 +78,7 @@ module.exports = {
       </Table.Cell>
       <Table.Cell>
       
-      The directory to upload files to. Medusa exposes the content of the `static` directory publically. If you change the directory, it must be served and publically accessible.
+      The directory to upload files to. Medusa exposes the content of the `static` directory publicly. If you change the directory, it must be served and publicly accessible.
       
       </Table.Cell>
       <Table.Cell>

www/apps/resources/app/infrastructure-modules/notification/sendgrid/page.mdx

@@ -188,7 +188,7 @@ Refer to the [Events Reference](/references/events) for a complete list of event
 
 You can also send an email using SendGrid in any [workflow](!docs!/learn/fundamentals/workflows). This allows you to send emails within your custom flows.
 
-You can use the [sendNotifcationStep](/references/medusa-workflows/steps/sendNotificationsStep) in your workflow to send an email using SendGrid.
+You can use the [sendNotificationsStep](/references/medusa-workflows/steps/sendNotificationsStep) in your workflow to send an email using SendGrid.
 
 For example:
 

www/apps/resources/app/infrastructure-modules/page.mdx

@@ -168,7 +168,7 @@ The Locking Module uses module providers that implement the underlying logic of
 
 ## Notification Module
 
-The Notification Module handles sending notifications to users or customers, such as reset password instructions or newsletters. Refer to the [Notifcation Module documentation](./notification/page.mdx) to learn more about it.
+The Notification Module handles sending notifications to users or customers, such as reset password instructions or newsletters. Refer to the [Notification Module documentation](./notification/page.mdx) to learn more about it.
 
 The Notification Module has module providers that implement the underlying logic of sending notifications, typically through integrating a third-party service. The following modules are provided by Medusa. You can also create a custom provider as explained in the [Create Notification Module Provider guide](/references/notification-provider-module).
 
@@ -220,7 +220,7 @@ The Notification Module has module providers that implement the underlying logic
 
 ## Workflow Engine Module
 
-A Workflow Engine Module handles tracking and recording the transactions and statuses of workflows and their steps. Learn more about it in the [Worklow Engine Module documentation](./workflow-engine/page.mdx).
+A Workflow Engine Module handles tracking and recording the transactions and statuses of workflows and their steps. Learn more about it in the [Workflow Engine Module documentation](./workflow-engine/page.mdx).
 
 The following Workflow Engine modules are provided by Medusa.