[date] set correct license and use vcpkg_install_copyright() (#32549)

ports/date/portfile.cmake

@@ -8,7 +8,7 @@ endif()
 vcpkg_from_github(
   OUT_SOURCE_PATH SOURCE_PATH
   REPO HowardHinnant/date
-  REF v3.0.1
+  REF "v${VERSION}"
   SHA512 6bdc7cba821d66e17a559250cc0ce0095808e9db81cec9e16eaa4c31abdfa705299c67b72016d9b06b302bc306d063e83a374eb00728071b83a5ad650d59034f
   HEAD_REF master
   PATCHES
@@ -41,4 +41,4 @@ vcpkg_copy_pdbs()
 
 file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
 
-file(INSTALL "${SOURCE_PATH}/LICENSE.txt" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}" RENAME copyright)
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE.txt")

ports/date/vcpkg.json

@@ -1,9 +1,10 @@
 {
   "name": "date",
   "version": "3.0.1",
-  "port-version": 2,
+  "port-version": 3,
   "description": "A date and time library based on the C++17 <chrono> header",
   "homepage": "https://github.com/HowardHinnant/date",
+  "license": "MIT",
   "dependencies": [
     {
       "name": "vcpkg-cmake",

versions/baseline.json

@@ -2018,7 +2018,7 @@
     },
     "date": {
       "baseline": "3.0.1",
-      "port-version": 2
+      "port-version": 3
     },
     "dav1d": {
       "baseline": "1.2.1",

versions/d-/date.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "b3ca1bdc08676cd1bb802421bd94a18872305737",
+      "version": "3.0.1",
+      "port-version": 3
+    },
     {
       "git-tree": "14d5c6822908ad2fd1d700cca2067ae4b8ef4404",
       "version": "3.0.1",