docs: typo (#1153)

summary: fix a minor typo in the procedure description

before
> In oRPC, a procedure like a standard function but comes with built-in
support for:

after
> In oRPC, a procedure is like a standard function but comes with
built-in support for:


**notes: documentation-only change.**


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Documentation**
* Improved clarity in procedure documentation through grammatical
corrections.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: SanyamPunia

apps/content/docs/procedure.md

@@ -5,7 +5,7 @@ description: Understanding procedures in oRPC
 
 # Procedure in oRPC
 
-In oRPC, a procedure like a standard function but comes with built-in support for:
+In oRPC, a procedure is like a standard function but comes with built-in support for:
 
 - Input/output validation
 - Middleware