Bump version to v1.28.0 (#874)

Co-authored-by: thesyncim <[email protected]>

Author: github-actions[bot]

Makefile

@@ -7,8 +7,8 @@ MAKEFLAGS += --no-builtin-rules
 MAKEFLAGS += -j$(NPROCS)
 
 CURRENT_VERSION_MAJOR = 1
-CURRENT_VERSION_MINOR = 27
-CURRENT_VERSION_BUG = 3
+CURRENT_VERSION_MINOR = 28
+CURRENT_VERSION_BUG = 0
 
 GIT_DESCRIBE := $(shell git describe)
 GITHUB_HEAD_REF ?= $(shell git branch --show-current)