Fix error while --set reloader.extraEnv.elk_port=<numeric value>

[a-b-v]

If you are trying to set numeric values to extraEnv, like
--set fluentd.extraEnv.elk_host="ELK_HOST" --set fluentd.extraEnv.elk_port="9200" --set fluentd.extraEnv.elk_user="user",
helm gives an error.

[vmwclabot]

@a-b-v, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <john.doe@email.org> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 8d40809 has a no-reply/unreachable author email address: 57939191+a-b-v@users.noreply.github.com

[vmwclabot]

@a-b-v, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <john.doe@email.org> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 8d40809 has a no-reply/unreachable author email address: 57939191+a-b-v@users.noreply.github.com
• Commit 79e9c18 must be signed by dluis@vmware.com

[vmwclabot]

@a-b-v, you must sign every commit in this pull request acknowledging our Developer Certificate of Origin before your changes are merged. This can be done by adding Signed-off-by: John Doe <john.doe@email.org> to the last line of each Git commit message. The e-mail address used to sign must match the e-mail address of the Git author. Click here to view the Developer Certificate of Origin agreement.

• Commit 63a5b2d has a no-reply/unreachable author email address: 57939191+a-b-v@users.noreply.github.com

[slimm609]

@a-b-v please sign the DCO if this is still needed