docs: normalize legacy server product name to "ownCloud Classic" (4.7) (#259)

docs: normalize legacy server product name to "ownCloud Classic"

Backport of the "ownCloud Classic" rename to this maintained version
branch so the published docs are consistent across versions.

Renames the legacy product to its canonical name "ownCloud Classic"
in user-facing text (prose, headings, link display text, the Antora
component title), fixes grammar where replacing the noun "Server"
left a dangling phrase, and normalizes the OC10 prose shorthand in
the migration guide.

Out of scope / unchanged: xref/include targets, module slugs
(classic_ui, oc10-app), URLs, hostnames, attribute names, and the
new product names (ownCloud Infinite Scale / oCIS). Version numbers
in this version-specific manual are kept (e.g. migration 10 -> 11).

Verified: every URL/xref target byte-identical, oCIS/Infinite Scale
occurrences unchanged, and the Antora build produces an identical
error set versus the base branch.

Part of owncloud/docs#5111

Signed-off-by: Thomas Müller <1005065+DeepDiver1975@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: DeepDiver1975

modules/ROOT/pages/accounts.adoc

@@ -18,7 +18,7 @@ Then, click btn:[Manage accounts]. From there, you can see all of the currently
 
 == Adding Accounts
 
-To add a new account is identical to creating the first account. Click btn:[Add account], and then follow the instructions in xref:connecting.adoc#connecting[Connecting to Your ownCloud Server].
+To add a new account is identical to creating the first account. Click btn:[Add account], and then follow the instructions in xref:connecting.adoc#connecting[Connecting to Your ownCloud Classic].
 
 == Viewing Accounts
 

modules/ROOT/pages/appendices/troubleshooting.adoc

@@ -83,7 +83,7 @@ D: 2023-09-04 09:57:38:562(LogBuilder.kt:38) .logHttp()[Network, response] [body
 | HTTP bodies (JSON, XML)
 |===
 
-### ownCloud Server Log File
+### ownCloud Classic Log File
 
 The ownCloud server also maintains an ownCloud specific log file. This log file must be enabled through the ownCloud Administration page. On that page, you can adjust the log level. We recommend that when setting the log file level that you set it to a verbose level like `Debug` or `Info`.
 

modules/ROOT/pages/faq.adoc

@@ -13,7 +13,7 @@
 
 == Usage
 
-=== Minimum ownCloud Server Version
+=== Minimum ownCloud Classic Version
 
 ownCloud Android app 2.15 has minimum requirement of ownCloud server 10.0 or later.