chore: update openapi to v1.12.1 (#1758)

## `openapi`

- [Add support for 3.2.0 openapi
spec](speakeasy-api/openapi#54)
- [Overlay support copy
action](speakeasy-api/openapi#87)
- [Support overlay version
1.1.0](speakeasy-api/openapi#97)

Author: danielkov

go.mod

@@ -20,7 +20,6 @@ require (
 	github.com/ericlagergren/decimal v0.0.0-20240411145413-00de7ca16731
 	github.com/fatih/structs v1.1.0
 	github.com/go-git/go-git/v5 v5.16.4
-	github.com/go-http-utils/headers v0.0.0-20181008091004-fed159eddc2a
 	github.com/gofrs/flock v0.12.1
 	github.com/google/go-cmp v0.7.0
 	github.com/google/go-github/v58 v58.0.0
@@ -38,7 +37,7 @@ require (
 	github.com/sethvargo/go-githubactions v1.1.0
 	github.com/speakeasy-api/huh v1.1.2
 	github.com/speakeasy-api/jq v0.1.1-0.20251107233444-84d7e49e84a4
-	github.com/speakeasy-api/openapi v1.11.3
+	github.com/speakeasy-api/openapi v1.12.1
 	github.com/speakeasy-api/openapi-generation/v2 v2.778.0
 	github.com/speakeasy-api/sdk-gen-config v1.43.1
 	github.com/speakeasy-api/speakeasy-client-sdk-go/v3 v3.26.7

go.sum

@@ -223,8 +223,6 @@ github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMj
 github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
 github.com/go-git/go-git/v5 v5.16.4 h1:7ajIEZHZJULcyJebDLo99bGgS0jRrOxzZG4uCk2Yb2Y=
 github.com/go-git/go-git/v5 v5.16.4/go.mod h1:4Ge4alE/5gPs30F2H1esi2gPd69R0C39lolkucHBOp8=
-github.com/go-http-utils/headers v0.0.0-20181008091004-fed159eddc2a h1:v6zMvHuY9yue4+QkG/HQ/W67wvtQmWJ4SDo9aK/GIno=
-github.com/go-http-utils/headers v0.0.0-20181008091004-fed159eddc2a/go.mod h1:I79BieaU4fxrw4LMXby6q5OS9XnoR9UIKLOzDFjUmuw=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
 github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -535,8 +533,8 @@ github.com/speakeasy-api/jsonpath v0.6.2 h1:Mys71yd6u8kuowNCR0gCVPlVAHCmKtoGXYoA
 github.com/speakeasy-api/jsonpath v0.6.2/go.mod h1:ymb2iSkyOycmzKwbEAYPJV/yi2rSmvBCLZJcyD+VVWw=
 github.com/speakeasy-api/libopenapi v0.21.9-fixhiddencomps-fixed h1:PL/kpBY5vkBmwLjg6l7J4amgSrPf3CNWReGNdwrRqJQ=
 github.com/speakeasy-api/libopenapi v0.21.9-fixhiddencomps-fixed/go.mod h1:Gc8oQkjr2InxwumK0zOBtKN9gIlv9L2VmSVIUk2YxcU=
-github.com/speakeasy-api/openapi v1.11.3 h1:7ExJYuJM3hiV35EROK3i+/w8SdEep3Ct9BivGaOkbNI=
-github.com/speakeasy-api/openapi v1.11.3/go.mod h1:ITV3em4IFe1Hd4gX5Peq9TE7+Rfd/WIHZE/aqxNgihg=
+github.com/speakeasy-api/openapi v1.12.1 h1:q8KqVo6P9SkDD4hulXBT6KoPU3BY4eeBiSUHbVSHAes=
+github.com/speakeasy-api/openapi v1.12.1/go.mod h1:ITV3em4IFe1Hd4gX5Peq9TE7+Rfd/WIHZE/aqxNgihg=
 github.com/speakeasy-api/openapi-generation/v2 v2.778.0 h1:Mpu4F3zs3DsmC7BMYzVryYeLzdc/p+0N1vPaVbT2zO0=
 github.com/speakeasy-api/openapi-generation/v2 v2.778.0/go.mod h1:ol7GV+VKS4rlkH1pkIdw55n0gXa3OOL+V32h65JRruA=
 github.com/speakeasy-api/sdk-gen-config v1.43.1 h1:rhhv6mAVV2yl1I6TqHkpunnOnSXyH5milgzEA9vJPEo=