build: Update module github.com/go-git/go-git-fixtures/v6 to v6.0.0-20260511090450-983ee99d1198

Signed-off-by: go-git-renovate[bot] <245267575+go-git-renovate[bot]@users.noreply.github.com>

Author: go-git-renovate[bot]

go.mod

@@ -6,7 +6,7 @@ toolchain go1.25.10
 
 require (
 	github.com/go-git/go-billy/v6 v6.0.0-alpha.1
-	github.com/go-git/go-git-fixtures/v6 v6.0.0-20260502205956-66bffbe5a6ff
+	github.com/go-git/go-git-fixtures/v6 v6.0.0-20260511090450-983ee99d1198
 	github.com/go-git/go-git/v6 v6.0.0-alpha.3
 	github.com/spf13/cobra v1.10.2
 	golang.org/x/crypto v0.51.0

go.sum

@@ -20,8 +20,8 @@ github.com/go-git/gcfg/v2 v2.0.2 h1:MY5SIIfTGGEMhdA7d7JePuVVxtKL7Hp+ApGDJAJ7dpo=
 github.com/go-git/gcfg/v2 v2.0.2/go.mod h1:/lv2NsxvhepuMrldsFilrgct6pxzpGdSRC13ydTLSLs=
 github.com/go-git/go-billy/v6 v6.0.0-alpha.1 h1:xVjAR4oUvrKy7/Xuw/lLlV3gkxR3KO2H8W+MamuVVsQ=
 github.com/go-git/go-billy/v6 v6.0.0-alpha.1/go.mod h1:eaCUpHbedW7//EwcYmUDfJe2N6sJC9O12AT0OTqJR1E=
-github.com/go-git/go-git-fixtures/v6 v6.0.0-20260502205956-66bffbe5a6ff h1:zowzt6mVzR9vXKYoFdJMhnslPh/GpQtpqfYyfWnTMSA=
-github.com/go-git/go-git-fixtures/v6 v6.0.0-20260502205956-66bffbe5a6ff/go.mod h1:76HL36y0VE9FnKvzsn9wfxukLV9iQWA+CqTk0Lg5ino=
+github.com/go-git/go-git-fixtures/v6 v6.0.0-20260511090450-983ee99d1198 h1:rbvg4C3q1Dbq5JVgy9QlpM2rEZfSq9g2V0t9EK190QM=
+github.com/go-git/go-git-fixtures/v6 v6.0.0-20260511090450-983ee99d1198/go.mod h1:ECf1MqJlBdYpKggBrOXjo/0EnvRZx6D++I86UYjPgAQ=
 github.com/go-git/go-git/v6 v6.0.0-alpha.3 h1:lJGritJ5AcC0X7buV0lReZ4cEHqcKB3Ab2ZjD3Ku+Ss=
 github.com/go-git/go-git/v6 v6.0.0-alpha.3/go.mod h1:DGnqu+twdAgtDx/4tQTWFrVE1an+2ACph3W9yOfSJZM=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=