Update module github.com/prometheus/alertmanager to v0.32.0

Author: renovate[bot]

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/go-openapi/runtime v0.29.3
 	github.com/go-openapi/strfmt v0.26.1
 	github.com/golang/mock v1.6.0
-	github.com/prometheus/alertmanager v0.31.1
+	github.com/prometheus/alertmanager v0.32.0
 	github.com/prometheus/client_golang v1.23.2
 	github.com/stretchr/testify v1.11.1
 	golang.org/x/exp v0.0.0-20260312153236-7ab1446f8b90

go.sum

@@ -82,6 +82,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/alertmanager v0.31.1 h1:eAmIC42lzbWslHkMt693T36qdxfyZULswiHr681YS3Q=
 github.com/prometheus/alertmanager v0.31.1/go.mod h1:zWPQwhbLt2ybee8rL921UONeQ59Oncash+m/hGP17tU=
+github.com/prometheus/alertmanager v0.32.0 h1:JER/KWXvbmSo6cd8EtnP7y+0VWKG8RiYH+hV/hHNYio=
+github.com/prometheus/alertmanager v0.32.0/go.mod h1:0Dy9faTtMgpVYxJVxV0o65elTxHnSRCF/7gy5BKGZiE=
 github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h0RJWRi/o0o=
 github.com/prometheus/client_golang v1.23.2/go.mod h1:Tb1a6LWHB3/SPIzCoaDXI4I8UHKeFTEQ1YCr+0Gyqmg=
 github.com/prometheus/client_model v0.6.2 h1:oBsgwpGs7iVziMvrGhE53c/GrLUsZdHnqNwqPLxwZyk=