Merge branch 'bump-version-1.15.0-rc.2' into 'main'

Bump version to v1.15.0-rc.2

See merge request nvidia/container-toolkit/container-toolkit!519

Author: Evan Lezar

versions.mk

@@ -14,7 +14,7 @@
 
 LIB_NAME := nvidia-container-toolkit
 LIB_VERSION := 1.15.0
-LIB_TAG := rc.1
+LIB_TAG := rc.2
 
 # The package version is the combination of the library version and tag.
 # If the tag is specified the two components are joined with a tilde (~).