Modify rule: Update rule descriptions (#3655)

Changes suggested by the Docs Squad:

* Modify rule s2178: Update rule description
- formalize word selection to clarify the description

* Modify rule S2551: capitalize `String`
- follow the capitalization of a proper noun, in accordance with the referenced link

* Modify rule S3923: improve word choice

* Modify rule S2551: capitalize String
- `String` is used as a VB `object` in this example. 
- A new PR will be issued to make a more substantial improvement

rules/S2551/vbnet/rule.adoc

@@ -4,7 +4,7 @@ The following objects are considered as shared resources:
 
 * a reference to https://learn.microsoft.com/en-us/dotnet/visual-basic/programming-guide/program-structure/me-my-mybase-and-myclass#me[Me]: if the instance is publicly accessible, the lock might be shared
 * a https://learn.microsoft.com/en-us/dotnet/api/system.type[Type] object: if the type class is publicly accessible, the lock might be shared
-* a https://learn.microsoft.com/en-us/dotnet/visual-basic/language-reference/data-types/string-data-type[string] literal or instance: if any other part of the program uses the same string, the lock is shared because of interning
+* a https://learn.microsoft.com/en-us/dotnet/visual-basic/language-reference/data-types/string-data-type[String] literal or instance: if any other part of the program uses the same string, the lock is shared because of interning
 
 == How to fix it
 

rules/S2551/why-dotnet.adoc

@@ -4,6 +4,6 @@ A shared resource refers to a resource or data that can be accessed or modified
 
 Shared resources should not be used for https://en.wikipedia.org/wiki/Lock_(computer_science)[locking] as it increases the chance of https://en.wikipedia.org/wiki/Deadlock[deadlocks]. Any other thread could acquire (or attempt to acquire) the same lock while doing some operation, without knowing that the resource is meant to be used for locking purposes.
 
-One case of this is strings, which are https://en.wikipedia.org/wiki/Interning_(computer_science)[interned] by the runtime. This means that each string instance is immutable and stored, and then is reused everywhere it is referenced.
+One example of this is a `String` https://en.wikipedia.org/wiki/Interning_(computer_science)[interned] by the runtime. This means that each `String` instance is immutable and stored, and then reused everywhere it is referenced.
 
-Instead, a dedicated private `object` instance should be used for each shared resource. Making the lock-specific object `private` guarantees that the access to it is as minimal as possible, in order to avoid deadlocks or lock contention.
+Instead, a dedicated private `object` instance should be used for each shared resource. Making the lock-specific object `private` guarantees that the access to it is as minimal as possible, in order to avoid deadlocks or lock contention.

rules/S3923/description.adoc

@@ -4,4 +4,4 @@ In the following code:
 
 include::{example}[]
 
-Either there is a copy-paste error that needs fixing or an unnecessary `switch` or `if` chain that needs removing.
+Either there is a copy-paste error that needs fixing or an unnecessary `switch` or `if` chain that should be removed.