patch 8.2.2502: a few github actions are failing

Problem:    A few github actions are failing.
Solution:   Install setuptools-rust. (closes #7823)

.github/workflows/ci.yml

@@ -207,7 +207,8 @@ jobs:
           COVERALLS_PARALLEL: true
           TRAVIS_JOB_ID: ${{ github.run_id }}
         run: |
-          sudo apt-get install -y python3-setuptools python3-wheel
+          sudo apt-get install -y python3-setuptools python3-wheel rustc
+          pip3 install --user setuptools-rust
           # needed for https support for coveralls building cffi only works with gcc, not with clang
           CC=gcc pip3 install --user cpp-coveralls pyopenssl ndg-httpsclient pyasn1
           ~/.local/bin/coveralls -b "${SRCDIR}" -x .xs -e "${SRCDIR}"/if_perl.c -e "${SRCDIR}"/xxd -e "${SRCDIR}"/libvterm --encodings utf-8

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2502,
 /**/
     2501,
 /**/