fix: standardize capitalization in documentation headers

Author: Le-Caignec

src/manage-data/dataProtector/advanced/apps-whitelist/createAddOnlyAppWhitelist.md

@@ -19,7 +19,7 @@ const isAddedToAddAppToAddOnlyAppWhitelist =
   await dataProtectorSharing.createAddOnlyAppWhitelist();
 ```
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type CreateAppWhitelistResponse } from '@iexec/dataprotector';

src/manage-data/dataProtector/advanced/apps-whitelist/getUserAddOnlyAppWhitelist.md

@@ -44,7 +44,7 @@ const allUserAddOnlyAppWhitelist =
   });
 ```
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type GetUserAppWhitelistResponse } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/getProtectedData.md

@@ -183,7 +183,7 @@ const listProtectedData = await dataProtectorCore.getProtectedData({
 });
 ```
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type ProtectedData } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/getResultFromCompletedTask.md

@@ -122,7 +122,7 @@ You can expect this callback function to be called with the following titles:
 
 Once with `isDone: false`, and then with `isDone: true`
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type GetResultFromCompletedTaskResponse } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/grantAccess.md

@@ -239,7 +239,7 @@ You can expect this callback function to be called with the following titles:
 
 Once with `isDone: false`, and then with `isDone: true`
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type GrantedAccess } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/processProtectedData.md

@@ -438,7 +438,7 @@ You can expect this callback function to be called with the following titles:
 
 Once with `isDone: false`, and then with `isDone: true`
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type ProcessProtectedDataResponse } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/protectData.md

@@ -302,7 +302,7 @@ You can expect this callback function to be called with the following titles:
 
 Once with `isDone: false`, and then with `isDone: true`
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import type {
@@ -426,7 +426,7 @@ You can access your encrypted IPFS data with the link:
 
 :::
 
-## Created protected data
+## Created Protected Data
 
 To further check your data was correctly created, you can inspect it on the
 [iExec explorer](https://explorer.iex.ec/).

src/manage-data/dataProtector/dataProtectorCore/revokeAllAccess.md

@@ -133,7 +133,7 @@ You can expect this callback function to be called with the following titles:
 
 Once with `isDone: false`, and then with `isDone: true`
 
-## Result
+## Return Value
 
 ```ts twoslash
 import { type RevokedAccess } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/revokeOneAccess.md

@@ -81,7 +81,7 @@ data).
 
 :::
 
-## Result value
+## Result Value
 
 ```ts twoslash
 import { type RevokedAccess } from '@iexec/dataprotector';

src/manage-data/dataProtector/dataProtectorCore/transferOwnership.md

@@ -75,7 +75,7 @@ const transferResponse = await dataProtectorCore.transferOwnership({
 });
 ```
 
-## Return value
+## Return Value
 
 ```ts twoslash
 import { type TransferResponse } from '@iexec/dataprotector';