Allow writable root filesystem for flaresolverr

The image copies and patches the chromedriver binary to the hardcoded
path /app/chromedriver at startup (no env override exists) and writes
chromedriver caches under /app, so readOnlyRootFilesystem cannot hold;
deviation documented in values.yaml. Reverts the HOME=/tmp workaround,
which only covered the cache path, not the binary patching.

freesailarr/templates/freesailarr.sfs.yaml

@@ -170,11 +170,6 @@ spec:
           env:
             - name: TZ
               value: {{ .Values.timezone | quote }}
-            # flaresolverr writes chromedriver caches under $HOME (image
-            # default /app, which is read-only); point HOME at the writable
-            # /tmp emptyDir so the root filesystem can stay read-only.
-            - name: HOME
-              value: /tmp
             {{- include "freesailarr.env" (dict "root" $ "env" .Values.flaresolverr.env) | nindent 12 }}
           ports:
             - containerPort: 8191