fix: missing newline in agent install codeblocks (#519)

because these are defined in a JSX CodeBlock and not a MD block, the
newlines were not preserved and the commands didn't work.

Author: irth

docs/agent-binary.mdx

@@ -8,7 +8,7 @@ You can download the latest agent binary release for your architecture from our
 <WithVersions language="bash">
   { versions =>
     <CodeBlock className="language-bash">
-      curl -sL https://github.com/parca-dev/parca-agent/releases/download/{versions.agent}/parca-agent_{versions.agent.substring(1)}_`uname -s`_`uname -m` -o parca-agent && \
+      curl -sL https://github.com/parca-dev/parca-agent/releases/download/{versions.agent}/parca-agent_{versions.agent.substring(1)}_`uname -s`_`uname -m` -o parca-agent && \{'\n'}
       chmod +x parca-agent
     </CodeBlock>
   }

docs/quickstart.mdx

@@ -43,7 +43,7 @@ import CodeBlock from '@theme/CodeBlock';
 <WithVersions language="bash">
     { versions =>
         <CodeBlock className="language-bash">
-        curl -sL https://github.com/parca-dev/parca-agent/releases/download/{versions.agent}/parca-agent_{versions.agent.substring(1)}_`uname -s`_`uname -m`
+        curl -sL https://github.com/parca-dev/parca-agent/releases/download/{versions.agent}/parca-agent_{versions.agent.substring(1)}_`uname -s`_`uname -m` && \{'\n'}
         chmod +x ./parca-agent*
         </CodeBlock>
     }