Add "PowerPC" to the list of valid CamelCase strings in docs (#15447)

```
changelog: [`doc-valid-idents`]: add "PowerPC" to the list of words not considered as identifiers
```

---

changelog: add "PowerPC" to the list of words not considered as
identifiers by `doc-valid-idents` rule

Author: Alexendoo

book/src/lint_configuration.md

@@ -555,7 +555,7 @@ default configuration of Clippy. By default, any configuration will replace the
 * `doc-valid-idents = ["ClipPy"]` would replace the default list with `["ClipPy"]`.
 * `doc-valid-idents = ["ClipPy", ".."]` would append `ClipPy` to the default list.
 
-**Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "MHz", "GHz", "THz", "AccessKit", "CoAP", "CoreFoundation", "CoreGraphics", "CoreText", "DevOps", "Direct2D", "Direct3D", "DirectWrite", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript", "WebAssembly", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenAL", "OpenDNS", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenTelemetry", "OpenType", "WebGL", "WebGL2", "WebGPU", "WebRTC", "WebSocket", "WebTransport", "WebP", "OpenExr", "YCbCr", "sRGB", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "NixOS", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]`
+**Default Value:** `["KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "MHz", "GHz", "THz", "AccessKit", "CoAP", "CoreFoundation", "CoreGraphics", "CoreText", "DevOps", "Direct2D", "Direct3D", "DirectWrite", "DirectX", "ECMAScript", "GPLv2", "GPLv3", "GitHub", "GitLab", "IPv4", "IPv6", "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript", "PowerPC", "WebAssembly", "NaN", "NaNs", "OAuth", "GraphQL", "OCaml", "OpenAL", "OpenDNS", "OpenGL", "OpenMP", "OpenSSH", "OpenSSL", "OpenStreetMap", "OpenTelemetry", "OpenType", "WebGL", "WebGL2", "WebGPU", "WebRTC", "WebSocket", "WebTransport", "WebP", "OpenExr", "YCbCr", "sRGB", "TensorFlow", "TrueType", "iOS", "macOS", "FreeBSD", "NetBSD", "OpenBSD", "NixOS", "TeX", "LaTeX", "BibTeX", "BibLaTeX", "MinGW", "CamelCase"]`
 
 ---
 **Affected lints:**

clippy_config/src/conf.rs

@@ -34,7 +34,7 @@ const DEFAULT_DOC_VALID_IDENTS: &[&str] = &[
     "GitHub", "GitLab",
     "IPv4", "IPv6",
     "ClojureScript", "CoffeeScript", "JavaScript", "PostScript", "PureScript", "TypeScript",
-    "WebAssembly",
+    "PowerPC", "WebAssembly",
     "NaN", "NaNs",
     "OAuth", "GraphQL",
     "OCaml",

tests/ui/doc/doc-fixable.fixed

@@ -74,7 +74,7 @@ fn test_units() {
 /// GitHub GitLab
 /// IPv4 IPv6
 /// ClojureScript CoffeeScript JavaScript PostScript PureScript TypeScript
-/// WebAssembly
+/// PowerPC WebAssembly
 /// NaN NaNs
 /// OAuth GraphQL
 /// OCaml

tests/ui/doc/doc-fixable.rs

@@ -74,7 +74,7 @@ fn test_units() {
 /// GitHub GitLab
 /// IPv4 IPv6
 /// ClojureScript CoffeeScript JavaScript PostScript PureScript TypeScript
-/// WebAssembly
+/// PowerPC WebAssembly
 /// NaN NaNs
 /// OAuth GraphQL
 /// OCaml