Update module golang.org/x/oauth2 to v0.27.0 [SECURITY] (v10.0/forgejo) (#7304)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [golang.org/x/oauth2](https://pkg.go.dev/golang.org/x/oauth2) | require | minor | [`v0.23.0` -> `v0.27.0`](https://cs.opensource.google/go/x/oauth2/+/refs/tags/v0.23.0...refs/tags/v0.27.0) |

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> ⚠️ **Warning**
>
> Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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### Unexpected memory consumption during token parsing in golang.org/x/oauth2
[CVE-2025-22868](https://nvd.nist.gov/vuln/detail/CVE-2025-22868) / [GO-2025-3488](https://pkg.go.dev/vuln/GO-2025-3488)

<details>
<summary>More information</summary>

#### Details
An attacker can pass a malicious malformed token which causes unexpected memory to be consumed during parsing.

#### Severity
Unknown

#### References
- [https://go.dev/cl/652155](https://go.dev/cl/652155)
- [https://go.dev/issue/71490](https://go.dev/issue/71490)

This data is provided by [OSV](https://osv.dev/vulnerability/GO-2025-3488) and the [Go Vulnerability Database](https://github.com/golang/vulndb) ([CC-BY 4.0](https://github.com/golang/vulndb#license)).
</details>

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7304
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Renovate Bot <forgejo-renovate-action@forgejo.org>
Co-committed-by: Renovate Bot <forgejo-renovate-action@forgejo.org>

go.mod

@@ -104,7 +104,7 @@ require (
 	golang.org/x/crypto v0.35.0
 	golang.org/x/image v0.23.0
 	golang.org/x/net v0.33.0
-	golang.org/x/oauth2 v0.23.0
+	golang.org/x/oauth2 v0.27.0
 	golang.org/x/sync v0.11.0
 	golang.org/x/sys v0.30.0
 	golang.org/x/text v0.22.0

go.sum

@@ -1662,8 +1662,8 @@ golang.org/x/oauth2 v0.4.0/go.mod h1:RznEsdpjGAINPTOF0UH/t+xJ75L18YO3Ho6Pyn+uRec
 golang.org/x/oauth2 v0.5.0/go.mod h1:9/XBHVqLaWO3/BRHs5jbpYCnOZVjj5V0ndyaAM7KB4I=
 golang.org/x/oauth2 v0.6.0/go.mod h1:ycmewcwgD4Rpr3eZJLSB4Kyyljb3qDh40vJ8STE5HKw=
 golang.org/x/oauth2 v0.7.0/go.mod h1:hPLQkd9LyjfXTiRohC/41GhcFqxisoUQ99sCUOHO9x4=
-golang.org/x/oauth2 v0.23.0 h1:PbgcYx2W7i4LvjJWEbf0ngHV6qJYr86PkAV3bXdLEbs=
+golang.org/x/oauth2 v0.27.0 h1:da9Vo7/tDv5RH/7nZDz1eMGS/q1Vv1N/7FCrBhI9I3M=
-golang.org/x/oauth2 v0.23.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.27.0/go.mod h1:onh5ek6nERTohokkhCD/y2cV4Do3fxFHFuAejCkRWT8=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=