fix(ansible): run solana bootstrap shells with bash

ansible/playbooks/doc-rpc-sol-min.yml

@@ -133,6 +133,8 @@
       become_user: "{{ solana_user }}"
       environment:
         HOME: "{{ solana_home }}"
+      args:
+        executable: /bin/bash
       when: not solana_validator_bin_stat.stat.exists
 
     - name: Link Agave binaries into /opt/solana/bin
@@ -146,6 +148,8 @@
           name="$(basename "$bin")"
           ln -sfn "$bin" "/opt/solana/bin/$name"
         done
+      args:
+        executable: /bin/bash
       when: not solana_validator_bin_stat.stat.exists
 
     - name: Re-check validator binary after install
@@ -165,6 +169,7 @@
       environment:
         HOME: "{{ solana_home }}"
       args:
+        executable: /bin/bash
         creates: "{{ solana_identity_path }}"
 
     - name: Check identity key exists