ci: fix goreleaser nfpm README path and bump to 0.122.6

- goreleaser nfpm contents pointed to ./core/README.md which doesn't
  exist; switched to repo-root ./README.md
- bump VERSION to 0.122.6 for third pipeline test

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.goreleaser.yaml

@@ -86,7 +86,7 @@ nfpms:
     section: utils
     priority: optional
     contents:
-      - src: ./core/README.md
+      - src: ./README.md
         dst: /usr/share/doc/orama/README.md
     deb:
       lintian_overrides:
@@ -108,7 +108,7 @@ nfpms:
     section: net
     priority: optional
     contents:
-      - src: ./core/README.md
+      - src: ./README.md
         dst: /usr/share/doc/orama-node/README.md
     deb:
       lintian_overrides:

core/Makefile

@@ -63,7 +63,7 @@ test-e2e-quick:
 
 .PHONY: build clean test deps tidy fmt vet lint install-hooks push-devnet push-testnet rollout-devnet rollout-testnet release
 
-VERSION := 0.122.5
+VERSION := 0.122.6
 COMMIT  ?= $(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 DATE    ?= $(shell date -u +%Y-%m-%dT%H:%M:%SZ)
 LDFLAGS := -X 'main.version=$(VERSION)' -X 'main.commit=$(COMMIT)' -X 'main.date=$(DATE)'