build: Update patch only for local release branch dev builds (#888)

Prevents confusion over what version is being built locally.

Author: jimmidyson

.goreleaser.yml

@@ -154,4 +154,4 @@ checksum:
   name_template: 'checksums.txt'
 
 snapshot:
-  name_template: "{{ incminor .Tag }}-dev"
+  name_template: "{{ incpatch .Tag }}-dev"