fix(ci): quote parameterized image: values in build-all-versions workflows

Strict YAML parsers reject the colon separating ${OS} and ${OS_VERSION}
in an unquoted scalar (it looks like a mapping value). Wrap the whole
image value in double quotes to make it an unambiguous string.

Mirrors the convention already used by
build-r-minor-sensitive-packages.yaml.

.crow/build-all-versions-amd64.yaml

@@ -39,7 +39,7 @@ depends_on:
 
 steps:
   - name: 'Build binaries'
-    image: reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}
+    image: "reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}"
     pull: true
     environment:
       RED_HAT_DEV_PW:

.crow/build-all-versions-arm64.yaml

@@ -54,7 +54,7 @@ depends_on:
 
 steps:
   - name: 'Build binaries'
-    image: reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}
+    image: "reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}"
     pull: true
     environment:
       RED_HAT_DEV_PW:

.crow/build-all-versions-install-deps-amd64.yaml

@@ -10,7 +10,7 @@ labels:
 
 steps:
   - name: 'Install deps and bincraft'
-    image: reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}
+    image: "reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}"
     pull: true
     environment:
       REPO_RO_TOKEN:

.crow/build-all-versions-install-deps-arm64.yaml

@@ -9,7 +9,7 @@ labels:
 
 steps:
   - name: 'Install deps and bincraft'
-    image: reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}
+    image: "reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}"
     pull: true
     environment:
       REPO_RO_TOKEN:

build-all-versions-install-deps.yaml

@@ -17,7 +17,7 @@
 
 # steps:
 #   - name: 'Install common R deps'
-#     image: reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}
+#     image: "reg.devxy.io/rpkgs/build-env-${OS}:${OS_VERSION}"
 #     pull: true
 #     environment:
 #       REPO_RO_TOKEN: