refactor(ci): use multi-R-version image in archive-missed-packages

Drop the R-version suffix from the image tag and invoke R via the
explicit /opt/R/${R_VERSION}/bin/R path. The image OS does not
matter for this workflow; it stays on alpine:3.23.

.crow/archive-missed-packages.yaml

@@ -36,7 +36,7 @@ matrix:
 
 steps:
   - name: 'Archive missed packages'
-    image: reg.devxy.io/rpkgs/build-env-alpine:3.23-4.5
+    image: reg.devxy.io/rpkgs/build-env-alpine:3.23
     pull: true
     environment:
       RED_HAT_DEV_PW:
@@ -53,10 +53,11 @@ steps:
         from_secret: GITHUB_PAT
       # normal env vars
       GIT_USER: pat-s
+      R_VERSION: 4.5.3
     commands:
-      - R -q -e 'pak::pak("git::https://codefloe.com/rpkgs/bincraft.git", dependencies = TRUE)'
-      - R -q -e 'packageVersion("bincraft")'
-      - R -q -e 'bincraft::process_unarchived_pkgs(Sys.getenv("CODENAME"), Sys.getenv("ARCH"), workers = 2L)'
+      - /opt/R/${R_VERSION}/bin/R -q -e 'pak::pak("git::https://codefloe.com/rpkgs/bincraft.git", dependencies = TRUE)'
+      - /opt/R/${R_VERSION}/bin/R -q -e 'packageVersion("bincraft")'
+      - /opt/R/${R_VERSION}/bin/R -q -e 'bincraft::process_unarchived_pkgs(Sys.getenv("CODENAME"), Sys.getenv("ARCH"), workers = 2L)'
     backend_options:
       kubernetes:
         resources: