minor #37963 Update Notifier bridge DSN in readme (jeremyFreeAgent)

This PR was merged into the 5.0 branch.

Discussion
----------

Update Notifier bridge DSN in readme

| Q             | A
| ------------- | ---
| Branch?       | 5.0
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Add missing DSN documentation in README for 5.0

Commits
-------

a404d056b3 Update Notifier bridge DSN in readme

src/Symfony/Component/Notifier/Bridge/Nexmo/README.md

@@ -3,6 +3,19 @@ Nexmo Notifier
 
 Provides Nexmo integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+NEXMO_DSN=nexmo://API_KEY:API_SECRET@default?from=FROM
+```
+
+where:
+ - `API_KEY` is your Nexmo API key
+ - `API_SECRET` is your Nexmo API secret
+ - `FROM` is the sender
+
 Resources
 ---------
 

src/Symfony/Component/Notifier/Bridge/Slack/README.md

@@ -3,6 +3,18 @@ Slack Notifier
 
 Provides Slack integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+SLACK_DSN=slack://ACCESS_TOKEN@default?channel=CHANNEL
+```
+
+where:
+ - `ACCESS_TOKEN` is your Slack access token
+ - `CHANNEL` is the Slack channel
+
 Resources
 ---------
 

src/Symfony/Component/Notifier/Bridge/Telegram/README.md

@@ -3,6 +3,18 @@ Telegram Notifier
 
 Provides Telegram integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+TELEGRAM_DSN=telegram://TOKEN@default?channel=CHANNEL
+```
+
+where:
+ - `TOKEN` is your Telegram token
+ - `CHANNEL` is the Slack channel
+
 Resources
 ---------
 

src/Symfony/Component/Notifier/Bridge/Twilio/README.md

@@ -3,6 +3,19 @@ Twilio Notifier
 
 Provides Twilio integration for Symfony Notifier.
 
+DSN example
+-----------
+
+```
+// .env file
+TWILIO_DSN=twilio://ACCOUNT_SID:AUTH_TOKEN@default?from=FROM
+```
+
+where:
+ - `ACCOUNT_SID` is your Twilio account SID
+ - `AUTH_TOKEN` is your Twilio auth token
+ - `FROM` is the sender
+
 Resources
 ---------