Fix typo in "Join a Teams meeting"

Author: tomaschladek

articles/communication-services/how-tos/calling-sdk/manage-calls.md

@@ -48,7 +48,7 @@ The following table show support for individual APIs in the calling SDK related
 |Start a call	to Microsoft 365 user	| ✔️	| ✔️  |  		
 |Start a call	to phone number	| ✔️	| ✔️  |  		
 |Join a room	      |✔️ 	|   | 
-|Joina Teams meeting           | ✔️	| ✔️ |
+|Joina a Teams meeting           | ✔️	| ✔️ |
 |Join a call based on groupId | ✔️     |    |
 |Accept or reject incoming call | ✔️     | ✔️   |
 |Hold and resume call | ✔️     | ✔️   |