fix(deps): update module github.com/cloudnative-pg/api to v1.26.0 (#440)

| datasource | package                       | from        | to      |
| ---------- | ----------------------------- | ----------- | ------- |
| go         | github.com/cloudnative-pg/api | v1.26.0-rc1 | v1.26.0 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.24.1
 
 require (
 	github.com/cert-manager/cert-manager v1.18.2
-	github.com/cloudnative-pg/api v1.26.0-rc1
+	github.com/cloudnative-pg/api v1.26.0
 	github.com/cloudnative-pg/barman-cloud v0.3.1
 	github.com/cloudnative-pg/cloudnative-pg v1.26.0
 	github.com/cloudnative-pg/cnpg-i v0.2.1

go.sum

@@ -16,8 +16,8 @@ github.com/cert-manager/cert-manager v1.18.2 h1:H2P75ycGcTMauV3gvpkDqLdS3RSXonWF
 github.com/cert-manager/cert-manager v1.18.2/go.mod h1:icDJx4kG9BCNpGjBvrmsFd99d+lXUvWdkkcrSSQdIiw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/cloudnative-pg/api v1.26.0-rc1 h1:luc/hVcTexAs/tXtT0aPSHf225LI/cjVIA1hjKDmsX8=
-github.com/cloudnative-pg/api v1.26.0-rc1/go.mod h1:U5/xay/XzQaQWDUZ/HbwxlY6e1gSPe1jB7ykoHciv/s=
+github.com/cloudnative-pg/api v1.26.0 h1:r0jt8PpYTHpdNBK2GXRC+lP56r7MBWni6iGMpnKjbjo=
+github.com/cloudnative-pg/api v1.26.0/go.mod h1:w+u3RxB3hYL1wh0x9CVPoaoG5MaYJdhRfw8SaIilsvc=
 github.com/cloudnative-pg/barman-cloud v0.3.1 h1:kzkY77k2lN/caoyh7ibXDSZjJeSJTNvnVt6Gfa8Iq5M=
 github.com/cloudnative-pg/barman-cloud v0.3.1/go.mod h1:4HL3AjY9oEl2Ed0HSkyvTZEQPhwyFOaAnuCz9lfVeYQ=
 github.com/cloudnative-pg/cloudnative-pg v1.26.0 h1:X+ayWg6TXqglziSPejKiviPTf/CSh4AmYXx1mrS3i8s=