chore docker(deps): bump golang from 1.25 to 1.26 (#47)

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Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.25 AS builder
+FROM golang:1.26 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 
@@ -31,7 +31,7 @@ RUN go install github.com/go-delve/delve/cmd/dlv@latest
 
 
 # Temporary until we have the latest features (registry-authfile, ...) in a released func cli version
-FROM golang:1.25 AS func-cli-builder
+FROM golang:1.26 AS func-cli-builder
 ARG TARGETOS
 ARG TARGETARCH